Yes. Always.

No, exiting CMC doesn't fix it, if by exiting you mean closing it with the top rightmost X button. I've been doing that many times a day while updating the content. I think I rebooted once or twice as well.

I had a few categories out of 67 whose length was excessive. They would run into the next column. I replaced them with shorter names and, though the new categories appeared as expected the old ones are still there. I've done full syncs, checked that the old categories have zero titles, optimized the...