I have an account... but I have to create a new one... but... I can't because I already have... an account? WHAT???

Hello, mr Wailing Wall. I don't expect much here but as it seems to be the only way to contact support... Here I go. I have an IMDB-account since way back in 2004. I have a user ID that I can see when I am logged in and everything. I go into settings. I decide to link accounts to Amazon and Google. Ok, So I get to the Amazon login. I enter my credentials. And the only option there is to create a new IMDB account... uh... ok. Seems needlessly convoluted. But I click continue. Then I get a message that I can't create a new account because I already have one. Well, yeah, creating a new account wasn't my idea, it was IMDB's. So... what the hecking heck is going on here? Do I have an account? I seem to have one, because I can't make a new account with that email adress, It says on my account details how long I've had the account. I have watchlists and everything that an account has. But... for some reason I can't connect the account to another service because I already have the acccount which I need to fo-...  And If I go to Login and Security... it just gives me a sign in page or Create a new account, Like I'm not logged in, but I am as I can see the watchli- ... WHAT THE EFFIN EFF IS GOING ON?!