Hi BKKKPewsey, thanks again for your help.
I see the drop down box and the delete/clone options you refer to for all users, except the problematic one. As you say, the options may be masked by the theme. I'm using the default theme, don't know what the name of it is.
For those interested, steps to reproduce:
- create a new user
- delete all players for that user in settings/player
- save settings
- go back to settings/players
Anyway, I managed to 'solve' it by finding all settings/database folders and deleting everything, then reinstalling. It would be a bit of an expensive solution once I've spent more time on the setup, but as I was just starting with it it's ok for me.
Haven't tried the above steps since - it works now, trying to keep it that way

When I find some time to mess around I'll try and see if I can find the hidden text or if changing themes solves it. Maybe I'll then also file a bug report on the default theme...