Double spawn as solo - me and me as fill

Entered Outpost as solo assassin, I think my own gear (not kit), run was 'Intro to SekGen', my twin/a twin of me also appeared as team fill (?!), had no gear. Same username, let run proceed (couldn't make things any worse anyway). I spawned into Outpost solo, no twin present, but I had no gear, at all, in Outpost. I became the twin. My doppelganger stole my existence. I don't feel any different, really. Managed to complete Intro to SekGen contract with just knife. ...This is my now-best Marathon memory.