Yeah if you're applying an item to multiple rooms at once, it's best not to filter by room because as you say, as soon as you leave the room area the options change. If you're doing multiples of the same item but across several rooms, you're best sorting them by A-Z or something that won't change (with square from the objects screen) 
I'm not sure on the beds issue but if you could keep it in mind going forward and if it happens again keep a note of the steps for me? If we can figure out the series of events I can try to recreate it and pass it to QA.
Nat D11
