I have not tried this but it seems to me that a • (option + 8 ) pushes items to the end of the alphabet and a ° (option + shift + 8 ) or a space pushes it to the beginning.

It might be worthwhile to disable everything but these two extensions using Extensions Manager, including disabling all control panels. If that makes it work, you can then re-enable things until the problem reappears to identify the problem.