California , Are you implying that the origin point of the Player should be somewhere specific? Or am I completely not understand you? XD
Throwing it out there, but I'm no expert in Platformer systems though I have made some myself in the past but, doesn't Jumpthru stuff ONLY focus on the lower part of the Player? If a player was lower than the top of the jumpthrough and touched the edge, literally nothing should happen, right?
Maybe that's what California is saying; maybe if the origin point is specifically placed somewhere on the player, Jumpthru's wouldn't affect the player? Though my origin point is placed at the middle bottom of the player. Hmmm...