Brief Description of Bug

Some items are missing between 'uncollected filter' and collectionator results.

Fresh (fast) scan; comparing weapons only as that's what i noticed.

Also Tested: The behavior seems to be consistent with fast and full scan

Playing on Rogue (same results on a Paladin in case it was a usability restriction):
Checked several different servers its same issue. Crafted TWW weapons are missing in unlearnt transmogs. Inscription weapons are there, but blacksmithing aren't. Oddly, learnt blacksmithing transmogs are there if checkbox is checked to include collected appearances.

Edit: Just noticed that Steelforged Dagger is missing too and it's not even an TWW item

Steps to Reproduce

Comparing scan results and manual results. (Scan done several times to make sure the item is still around in main AH list).

Other:

Possibly others are missing too but not sure. During tww prepatch time, a lot of salvaged gear from the Draenor garrison salvage yard became boe and were being listed in AH but were not showing up, and even now occasional items aren't being picked up from gray/white variety. It's somewhat random and I'm also wondering if it's some sort of AH data quirk... ie it doesn't consider opposite faction items or something. Or if some categories shifted around in the AH api.

Thank you kindly for fast responses to my prior findings.

Seems to heavily affect blacksmithing TWW gear, this one is a shield (cheapest one):

Missing in the collectionator... playing as paladin, so it's definitely usable:

So I suspect this isn't an issue with collectionator but an AH data issue. For example, checking uncollected filter in default AH interface, clearly missing pioneer's robe, which does show up in collectionator list... so blame blizzard probably:

Edit: Forgot to say this behavior changed in 11.0.5 as the robes were showing up before the patch in the uncollected filter