I have been wondering for a while what contributes here. I've had instances where returning units increase the amount of used spots in the staging area, but in general it appears that every unit not within my base somehow contributes.
I am also a tad curious about units placed in bunkers.
Can we get some official word on this because I'm suffering a few glitches pertaining mostly to suddenly having more units than possible (according to numbers) and a situation where the numbers over the building itself are NEVER accurate (or even close).
I don't play much anymore =(