What steps will reproduce the problem?
I noticed while clearing molten core (solo) that the incorrect items would show as looted if i was previewing them in the dressing room.
I previewed an item or two (tier not for my class, rogue), looted a BoE. There were 2 boes on the boss and the one I /didnt/ loot was removed from the loot list bag. Reopening the corpse loot showed the correct loot.
I also picked a few items off Nefarian in BWL, including two boe blues. Neither were removed from the loot window until re-opening it.

What version of the product are you using?
z25d-release

Do you have an error log of what happened?
Screenshot here- http://imgur.com/p6m9F
You can see the green robe and the blue boots are in my inventory, but still on the loot window.

Please provide any additional information below.
Possibly related to my inventory being full and clicking to loot a few times, though this is a new issue since the latest xloot update.
Also using XLoot legacy plugin with the group/master/monitor plugins.