I picture sure would help. I’m having trouble visualizing your dilemma.

The Q’s are pretty damn forgiving. They don’t have to be positioned ‘exactly' where you think they need to be. I mean, a little to rear, a little to the front, a little to east or west……It just doesn’t matter that much. I’ve got mine in an ‘all kind of weird and unacceptable manor’ and they do exactly what they are supposed to do. They certainly don’t sound as if they aren’t in the right spot. You may be able to mount them out of your traffic path without issue.

I don’t think you will get much relief from the other bookshelves as they are all as tall or taller than the QS 8’s. The QS 4’s are a tad shorter, but not by much.

Can you post a picture?