When I sort my inventory by category, items occasionally get put in the "account upgrade" category which I don't see any upgrade-related use for, like Lime Bomb...is it some sorting bug, or what does it mean?

Interesting. I don't use the category sort very often, but whenever I have I've found it to be an approximation at best. I'm not sure where/how the categories are determined, but would assume that the older the item is, the less accurate the sorting will be.

I checked out the Lime Bomb at SubetaLodge and it seems to be a totally normal weapon. Nothing account related, not a stat booster, or anything else special. It is listed as both food and weapon, though, so its possible that anything with multiple uses might show up in that category? Who knows.

Nah, I've seen stuff with multiple uses in other categories, like edible minions...Looks like a bug, or we're missing something...