Quote Originally Posted by Niwashi View Post
How are they getting un-stacked in the first place? I've never seen a case where items didn't stack automatically when you get them or transfer them.
When you use items that you have multiple stacks of, it doesn't use the lowest stack first but rather the first stack in your inventory. For instance, if you have a stack of 99 hides and then a partial stack of 50 of the same hides; you turn 50 of them into leathers and you'll have 2 partial stacks (49 and the original 50). This is something I encounter a lot if I don't make sure the smaller stack is the earlier item in my inventory.

Also, sometimes you'll want to manually break a stack. Say you have 99 and 5 leathers and you want to put 50 on your retainer for use later. You get left with 49 and and 5.

In either case, you recombine the stacks afterwards.