Thanks Don and JD.
Maybe it's the 3-dot column that's the problem then, as that column only appears to me for my own club and not anyone else's, and even then only because I'm an owner. I'll check with the membership to see if the page looks okay to them.
So yes, my best guess now is that the 3-dot 'Edit or Remove' options column is the problem here as the dots are noticeably out of alignment in each row.