Split Screen Hitbox Incorrect Spot

Okay so I've been running an experiment with a split screen using Sub Apps, and for the life of me, I cannot figure out why the girl character's hitbox/ zone is not following her correctly/ not showing up in the right spot on both screens. Thought I had everything down, but if somebody could take a look at my mfa and tell me my error, that'd be awesome.

Again, just experimenting with the split screen sub app. I read something about MDI, since I do have the Developer version, but there's absolutely nothing written about it that I've been able to find.

https://expirebox.com/download/c1bb3...221694407.html