Can't set up guest network name and security

I didn't get back to this for a couple of weeks for lots of reasons not the least being the pandemic. So when I went to look at it again I thought, "Hm, why don't I just give it another try via the 'usual' route with the web login?" And lo and behold this time it worked. The guest network name and password "stuck" and it doesn't just show Netgear Guest now. I swear I didn't do anything different, I didn't reset the router, I didn't use a different browser... nothing. It just for some reason worked. So, everyone's happy, though I'm a little irked because I'd like to know why it worked now but not before. But I'm not going to question it! No sir! 

Thanks to all those who provided advice, and to everyone, please take good care and stay healthy!