.. Consequently I end up with a ton of items on the wrong layer and have to move them where they belong ...
HAHA ... I do exactly the same, so much so, that most of my layers are defined as a specific colours, so that I can Immediately see when I'm drawing in the wrong layer. AND I still end up doing it for a few items, and then look and wonder why they are that colour ... AHHH, the joys of getting old.