Modpack version
0.5.10

Describe the bug
While making a TiCon sword, I added the Melting ability to it, giving it 1296mb fluid capacity for the weapon to melt fluid into. When adding a Seared Tank, this should add another 1296mb to the capacity. When doing so, however, the fluid capacity only goes up to 2448mb instead of the 2592mb that math says I should get.

Logs
N/A

Screenshots

[At time of report, I'm currently livestreaming at http://twitch.tv/MaxFirestorm if you want/need to see anything happening live]

Thanks for the report, nice and detailed 👍 I relayed it here: SlimeKnights/TinkersConstruct#4605

Would you mind testing it in an instance with only Mantle and Tinkers Construct? :x

Can do once my stream is over in around 15 minutes or so!

Thank you very much :)

DarkAngel22579 tested it for us, you're off the hook :D

Just as I'd finished xD No worries! Thanks for letting me know x3