I am having similar issue.
I believe Bitbucket.org forgot my account email after the integration with Atlassian.
bitbucket.org let me create a new account with the same email address I had before.
I am sure it was the same email. But now, I lost access to my repositories (e.g. https://bitbucket.org/makeitplay)
I figured out this morning what happened.
One of my Jira project/workspace was migrated to another account. I assumed I was only changing my account in Jira to use another email, but creating another entirely new account.
Turned out that actually my personal account had the email changed, so all my personal repos are associated to my corporative email.