I wanted to see how many trades you could have running (10 coins + 10 gems + 1 Free) and as items sold, the order got screwy on me. The whole listing is screwed up where 6 is after 9, 21 is before 15, and as you can see Free and 3 are at the end of the list.
Only annoying because I have to search around to find my free slots.
As a side note as well, it should shuffle down the order. if I've sold all my stuff in slots 5 and 6 (15 and 18) i shouldn't have to pay 15gc and 18gc to list more items. i should only have to pay 3gc and 6gc respectively, don't you think?