I wasn't sure where to post this, so here it is.
I've noticed (not related to current TP problems) that I'll list an item to sell on TP and it will be listed as the cheapest price for that item. Gold is then removed from my account for the listing. After a few weeks of not selling, I'll go back and find that it's no longer the cheapest because other players have listed the same item cheaper. If I cancel my sale, so I can relist it as a cheaper price, more gold is removed from my account. Then, when I relist the item, I'm charged again for listing it.
I think that is unfair. Once someone lists an item, and wants to make it cheaper, they should be able to lower the cost of the item without being double charged.