Can you move the dirty water recipe into the resources tab?
Having SE, K2 and brevven mods running and this recipe is the only one opening a new tab and thus creating a second inventory category bar.
I am currently not sure how other recipies like this are handled, maybe they are hidden in player inventory or in the resources tab, but one new tab and with this also this second bar seems unnecessary. Thanks for addressing this :D
Interesting. You certainly have a mod installed that re-arranges the inventory tabs and recipes, because with only SE/K2 they show up at different places. That would also explain why you have an additional fluid tab you should not have.