Another user's tracks and waypoints showing up in my profile

Just noticed a couple of tracks and a page worth of waypoints in my profile that aren't mine. They are all from South America for what it's worth. I'm in North America. It looks like they have been having a good time.

Anyway, they are all from the same date (Nov 1). Just wondering if anyone else has seen this? I want to delete them but don't want to kill their data if it's some sort of bug.

I've changed my password.

Edit: Turns out I imported a KML file which will populate waypoints and tracks. Deleted KML file and all good.