I made the mistake of logging in with my gmail account, creating a third atlassian community account. All I want to do is log back in with my normal credentials but when I log out and try to log back in it autologs in with gmail.
No, I can't use another browser because I'm already using it for my work related atlassian account.
Here are some details shared by @Scott Theus recently on another thread that may be helpful for you.
There isn't a way to merge two accounts, but there is a bit of a work around here: https://community.atlassian.com/t5/Feedback-Forum-articles/Usernames-privacy-email-changes-alter-egos-and-you/ba-p/1056964
...Or you can email communitymanagers@atlassian.com with the details to see if they can help.