I visited "sledgehammer"'s account on bitbucket. If you recall creating the account about two years ago and can remember creating the repo "my-play-ground" as a test, then maybe you can try checking some other old email addresses of yours. If not, someone else has it. Pity the name is unavailable and the user isn't doing anything with the account.
It is helpful to have Bitbucket user names match forum names when they can, but not necessary. Create an account with a different name. In your first several posts, sign "sledgehammer" or "John" at the bottom of the post itself. People tracking the bug posts will learn quickly to recognize your Bitbucket username as being you.
Thanks for your reports so far, and for helping to make them even easier to follow.