Custom Story Won't Save Progress

[Tetrafish]

Having the same problem. Perhaps my issue will also resolve itself somehow mysteriously.

I don't see the name of the level I last played in a custom story when I click on 'Load Game'. I'm assuming this is where it would be found.... There's nothing indicating that last place I made it to (not even any 'checkpoints/save-points'). I'll try it again to see if it ACTUALLY saved this time... try to load my previously saved game. But still, I had the game lag really really bad after speed-running back up (towards) to where I was last playing.

I'll come back and edit and report if it's magically fixed.

edit: Whatever it did -- it did. Save/Checkpoints are now listed.