I had a lot of problems concentrating/not being tired today, so I bailed on thinking work and put up more shoe rack.
I don’t know why I’m surprised and angered at this point (I’ve tried five different stud finders of varying levels of fancienss at this point), but the stud finder was wrong again, and one of the screws went into pure drywall. The shelf pulled away when I tested it.
So I mounted it at a lower point, and it is not aligned with the other one as planned.
The paint color not matching the existing shelves’ color is bothering me more than expected, but I still think it’s better than buying new paint just for this.