This is the first time I've noticed this one... but I used the mock Broker to summon Item 1, the huge Bag LE made. Put it in my inventory slot 1, opened it, and threw a couple things into it.

I logged out for a while, came back a bit later and saw that my Chest item was gone - completely gone from my inventory. So I opened my bags (B) and low and behold, I have 2 Lethal bags... 1 in slot 1, the other in (slot) 251. wtf?
My thought is, containers have a little ways to go yet