SavedInstances uses information in instancelink to track how many bosses are defeated. However, there are some problem with BoD's instancelink. Instead of marking a bit in bitmap true for every boss defeated in usual, killing first 3 bosses marking least 5 bits true. So, if first 3 bosses are defeated in your instance, KILLED is showing 2 more bosses. Here are some example of my own instances

But I am not sure which two bits are being marked true when first two bosses defeated, so I am looking for help. If you have only killed first one or two bosses, you can help us by following steps.

1. Click your DifficultyString like "6/9" in SI's tooltip, then it will be a link in your chat input
2. Add a pair of quotes and /dump to the very head, it will be like /dump "[Battle of Dazar'alor]"
3. Press Enter and post what you get here

Your help will be very important to us and these workaround.

Hi, This is from a 9/9 Normal lockout showing 11/9

Dump: value="[Battle of Dazar'alor]"
[1]="|cffff8000|Hinstancelock:Player-61-0B48BA51:2070:14:201567|h[Battle of Dazar'alor]|h|r"

Hello, This is from 7/9 Normal Lockout showing 9/9
[1]="|cffff80000|Hinstancelock"Player-71-0BDDCF1A:2070:14:4959|h[Battle of Dazar'alor]|h|r"

Also, LFR shows 3/18 completed. I couldn't click that one as it does not show up

I believe I've gathered all the required bit flags. The structure is somewhat different because the second and third bosses aren't identical for both factions, which increases the total number of bosses. It's safe to assume that killing one will set BOTH faction's flags, thereby increasing the total amount that SavedInstances displays by one or two, respectively.

Additionally, there seem to be unused entries, but that shouldn't be a problem. Here are the individual flags for each faction, which I collected using this test script:

Notes:

• I assume that these are the only bit flags being used, as there aren't any other bosses as far as I know
• Changing difficulty to 15 or 16 (Heroic/Mythic) doesn't seem to change anything. Disclaimer: I did NOT test every single combination, just a few to be reasonably certain
• It seems likely that killing one of the faction-specific bosses toggles two flags instead of one, though I can't test it myself
• The bosses are numbered according to the order displayed in the tooltip. So for Horde, Grong is 2 and for Alliance it is 3, with Jadefire Masters being 3 for Horde and 2 for Alliance instead

I believe I've gathered all the required bit flags. The structure is somewhat different because the second and third bosses aren't identical for both factions, which increases the total number of bosses. It's safe to assume that killing one will set BOTH factions flags, thereby increasing the total amount that SavedInstances displays by one or two, respectively.

Thanks for the update. I guess I should have mentioned that I run Horde. Thought never really crossed my mind that there was an Alliance side, lol. Good work and I'm glad you put this together as I use it frequently.

Appear to be getting errors with my dumps :(

4/9HC lockout showing 6/9HC
[15:06:14] Dump: value="[Schlacht von Dazar'alor]"
[15:06:14] [1]="|cffff8000|Hinstancelock:Player-1118-05AA9A00:2070:15:287|h[Schlacht von Dazar'alor]|h|r"

Some more values for you from an Alliance player:

1/9M:
[1]="|cffff8000|Hinstancelock:Player-580-04430F9B:2070:16:26|h[Schlacht von Dazar'alor]|h|r"

5/9H:
[1]="|cffff8000|Hinstancelock:Player-580-04430F9B:2070:15:351|h[Schlacht von Dazar'alor]|h|r"

2/6 Heroic (horde): [1]="|cffff8000|Hinstancelock:Player-3678-07B71F7D:2070:15:14|h[Battle of Dazar'alor]|h|r"
Showing as 3/9H, set bits are 1110, which correspond to Champion of the Light (2^3), Jadefire Alliance (2^2), and Grong Horde (2^1)

3/9 Mythic (horde): [1]="|cffff8000|Hinstancelock:Player-3678-09F02666:2070:16:31|h[Battle of Dazar'alor]|h|r"
Showing as 5/9M, set bits are 11111.

9/9 Heroic (horde): [1]="|cffff8000|Hinstancelock:Player-3678-09F02666:2070:15:201567|h[Battle of Dazar'alor]|h|r"
Shows as 11/9H, set bits are 110001001101011111

Also pinged an alliance friend, and got this:

2/9 Heroic (alliance): [1]="|cffff8000|Hinstancelock:Player-86-075D54DA:2070:15:14|h[Battle of Dazar'alor]|h|r"
Set bits are 1110, which is identical to the 2/9 Heroic (horde) link above from my hunter.

I'm still waiting to hear back from a guildy that was only around for our Champions kill in mythic this week, but I fully expect his link to have a bit pattern of 1000. From the comparison of these strings, I suspect your initial expectation was correct. When you kill the first boss, it sets the Champions bit (which is weirdly the 4th bit). When you kill the 2nd boss, regardless of faction, it sets the Grong (horde) and Jadefire Masters (alliance) bits. When you kill the 3rd, it sets the Jadefire Masters (horde) and Grong (alliance) bits. Thus the bit patterns for each level of progression, regardless of faction, should be:

X/9 bitmap decimal
0/9 000000000000000000 0
1/9 000000000000001000 8
2/9 000000000000001110 14
3/9 000000000000011111 31
4/9 000000000100011111 287
5/9 000000000101011111 351
6/9 000000001101011111 863
7/9 000001001101011111 4959
8/9 010001001101011111 70495
9/9 110001001101011111 201567

However, there's anomoly in the comments above. cremor has a 1/9M lockout with a bit pattern of 11010, which corresponds to Champion of the Light, Jadefire (Horde), and Grong (Horde), without the expected alliance boss bits set. I suspect this was a case where cremor accepted the lockout later in the week, after the first 3 bosses were down, and it only set his faction-specific bits rather than all of the first 3 boss bits.

Edit: perhaps not. I had a guildy with our 3/9M lockout invite my (unsaved) hunter, went into the instance, and saved myself, and got a lockout 31 (11111), which is the same as my DH main has above. Perhaps it's because cremor was there for the first boss, and then the raid lockout progressed without him? I'll know more when my guildy that was only there for the first boss this week gets back to me.

LFR seems to have a different issue. My LFR pattern is this:

6/9 LFR (horde): [1]="|cffff8000|Hinstancelock:Player-3678-07B71F7D:2070:17:863|h[Battle of Dazar'alor]|h|r"
Showing as 6/18, set bits are 1101011111

Which is properly counting the number of bosses cleared (oddly) as 6, but showing there being 18 killable bosses rather than just 9.

For the faction-specific bosses, I suggest simply checking both bits (via OR) and counting either one as one boss regardless of faction. This should work with either combination as long as any one of the bit flags is set by the game, which it should be. If the extra bits are filtered out that way, most users should get an accurate count.

The LFR issue probably needs to be looked into. Perhaps it is considering each boss twice?

@SacredDuckwhale 's table is right, and I am working on this which might be done these days.

Mythic is quite different, it marks the other faction bosses true when you kill the first boss, unlike in Normal or Heroic.

For LFR, it is because Blizzard have 3 new LFR wings for each faction, but their parent id is the same, so SI add all these wings up and make the number of total bosses is 18, twice of 9. Since we have more Combined LFR issues, like #217, so I'd like to solve it later, as it's not urgent as this.

Mythic is quite different, it marks the other faction bosses true when you kill the first boss, unlike in Normal or Heroic.

Yep, looks to be accurate. My guildie who was there for only Champion (mythic) this week got back to me and had a link with a bit pattern of 13 (1101), which corresponds to Champion and the two alliance bosses. So that would also explain cremor's link, he's alliance and had only killed the first boss that week, and thus had Champion and the two horde bosses flagged.

I love it when Blizzard just YOLO's the API...