Hello and welcome to Go Top 100! Sorry to hear you are having problems
As far as activation, you have already activated your list - if you try to activate it again, that's when you get that error that you are using an invalid key.
The log in problem is something that we just discovered very recently and it is only affecting those lists with underscores in their names. We are searching for a new programmer to solve this problem and continue making upgrades to our system. In the meantime if you want to sign up for a new list such as momsrus.gotop100.com without the underscores that would probably be the fastest fix.