add to that the fact that it resets the entire list if anyone happens to buy/sell an item to the vendor while you're browsing, meaning it takes you back to the very top of the list.
add to that fact that if you even TRY to custom it, it will make every item in the merchant's inventory disappear and you cannot buy anything.
add to that fact that it will no longer sort spells by levels on spell vendors.
add to that fact that it just plain sucks and needs to be fixed, see my post
HERE to sony's forums asking for a fix of some sort and asap.
IMHO this window, which is exactly like guild bank window which is on the top 5 of my most hated things in EQ, is nothing more than a time sink a major PITA and needs to be at MINIMUM customizable.