I see you're mixing 2D & 3D layers. Try making all of them 3D and see what happens. The only exception might be the bottom-most layer in the comp, which you might be using as a constant background.
Well, it's not particularly useful to align stuff in the Front view and then simply switch on 3D, hoping it might look alright in the main comp camera. You simply go about it the wrong way. Typical beginner error. Align your stuff in 2D in the active camera view before going 3D.