Today I wanted to ask a question on Super User. It showed me that I'm not logged in so I clicked "log in". I first tried my e-mail and password, but it didn't work.
Next I tried to log in using my Google account. It worked, but I got a username like userXXXXXX, which is not my normal username (Barteks2x). So I deleted this account and thought I would try again with different email and password. But to my surprise there was no "log in" button any more.
There was only the "join" button. So I clicked it. It wanted me to log in with Google which didn't work. After half hour of trying to find some way to log in normally I decided to continue logging in with Google. When I logged in I saw that I can switch to my Stack Overflow account by clicking the "Stack Exchange" button on the top, so I thought everything was OK now, so I proceeded to ask this question: https://superuser.com/questions/1098915/copying-files-to-usb-3-0-external-hdd-connected-to-usb-3-0-hub-with-external-pow.
After I asked it I realized that I have the randomly generated username, so I thought I accidentally created new account instead of logging into existing account. So then (I know it was probably wrong thing to do) I edited my question to include a question what I can do about it. One comment said that I can delete this question and re-create it from original account. So I deleted the question, and deleted the account again.
Now I see that I can easily log into my Stack Overflow account, but whenever I try to join Super User I get this strange random username, which is apparently the same account that I already deleted twice.
What is going on? How can I fix the mess?