Anyone else know about this ?

I just tried to register on dosgamer.com, got told my email and username were already in use. Hadn't signed up here before as far as I knew, so that was a bit confusing. Tried my dosgamezone.com login on a whim and it works here too!

Changed my password here and dosgamezone.com password is also changed.

So I'm guessing DOS Gamer and Dos Game Zone are basically sister sites or somehow connected behind the scenes? 

The designs feel very different, so I always thought they were completely separate communities.

Not complaining btw, actually pretty convenient not needing another account.

Can anyone confirm, did I accidentally discover a shared universe?