AWESOMEMANS'S PROFILE

This has been happening since I got the game. The character in the game will walk through all kinds of stuff, or on top of stuff on layer 2 and 3, which I'm PRETTY sure isn't supposed to happen, right?
Umm, can someone help me? It's getting kind of annoying.

And this isn't with EVERYTHING on layers two and three, just some stuff. Like some barrels that I just placed you can't walk on top of while the others you can.