Since they added the regent bank I have had lots of empty Tradeskill specific bags in the bag I have been slowly changing.
What I have noticed is that when I sit at the banker and remove them ( I removed 4 portable refrigerators and a Royal Scribe's Satchel ) on last toon I was on, then headed to the AH to pick up some new bags, when I opened my Bag and click on the bank option to see the bank it still showed the bags across the top of that screen even though I had removed them and they were in the bank bag and empty. When I clicked on them on the top of the screen it opened them on my Bank Tab as if they were still in their slots before I removed them.
Not sure what causes the problem but wanted you to know . has happened on a few toons this is just the last one I was on.

Cannot replicate