Cax80 Repeatedly will tell me Someone's logged-in and I cannot change any information

Cax80 modem-router Continuously says someone's logged-in, and it therefore Cannot change any of the Settings. I know that's not True. So, I click to take control. Click Yes. It will not let me. It keeps bugging-out. Keeps saying that someone's logged-in and won't Let me take control. It is a brand-new router from best buy. Finally, I looked at who this is that's been Logged-in, and it's Me!!!! It is saying that I cannot log in because (I) am logged-in!!! Well, no I'm not. So, I try and log out, and the Whole thing's just one big Vicious Circle

How to tell it that i AM NOT logged-in, so that I can log in?!? This thing seems to have a lot of Issues with RAM memory, huh? I noticed quite a few other people commenting having issues with it not saving passwords, etc..