Unwanted forks

Today I checked my profile page and was surprised that I own 2 repositories. They seem to be forks of other projects I have visited before. But I am quite sure that I never (at least consciously) created a fork! Is there anything that automatically creates forks when doing something else?

Yes. Editing a file through the web UI (on a repo you don’t have collaborator access to) for instance in order to propose a change.