I have a very very simple suggestion (didn't find anything similar in the tracker):
made the "Lock this object in position" check-box persistent that is when you select "Lock this object in position" check-box the next time you load the game it remains checked.
When you have two or more object overlapped it's very frustratingÃ, >:( select each time all the "Lock this object in position" check-box.
CIAO
Sounds reasonable to me.