A lot of us including myself always ALWAYS assumed actor and the mark we see in heist, date, and space were the same.
Maybe that mark IS a separate mark, but in the same way an oc or self insert is separate from you.
When people write self inserts (like this whole series is for us) they tend to give them selves different traits here and there, different backgrounds.
Date/heist/space partner in crime mark is just another character created by actor.
Meta endings are the only time we interact with Actor, but the mark we see otherwise is just as much a creation of actors and a pawn, another person that exists in and is at the mercy of the story as any other character.
this persons post pointing out his panic over “viewers” is a good bit for this to.