merchant window

[BigGino]

I am using the fetish nightfall ui, which i am very pleased with. but since the last update i am having problems with the npc merchant windows. I cant sell or repair anything. all the items that the merchant is selling are listed under the buy tab, but when i switch it over to sell or repair the same items stay there instead of switching to the stuff in my inventory. Can anyone tell me whats going on or give me a quick fix around this

Thanks
Gino