Friendly neighborhood mod popping in
The reason your other account was suspended indefinitely is that it is what we consider a dupe account, an account created by a user who already had/has an account on the message boards. These are strictly prohibited under Amendment III of the Behavioral Rules.
According to the other topic you created that coincides with this, your dupe account was created for your new Gmail. I don't know why you decided to create the new account, as you can easily change your email under the preferences in your profile. Heck, I've even done this in the past. Also, if you wanted to change your name or something, all you would have to do is just pm us mods and we would gladly change it for you.
Hopefully that clears everything up,