I have no idea how this happened?
I logged in using my usual email address and password, went to TIO and realised I hadn't been on any of the threads in question and the account settings were completely different 
Then I realised it was someone else's account? Needless to say I logged straight out. I entered the same details again and now I'm back as me.
For the record, I'm not a name changer and have never heard of the person who I logged in as (see attached pic).