no success with meshes

I have been trying to make a mesh in milkscape. First a made a couple of not-so-great ones. The first one I made by scaling x and z directions by 0.7. It looked okay in CAS except the head was floating above the body.

Next I tried to make a muscular mesh and it turned out terrible. The sim had a flat triangular chest and his nipples were hidden behind a pointy area on his sides.

Then I did a few experiments and was amazed by the results. I put in muscles for the arms and shoulders and decided to test it out before I did the rest. Well first I had trouble exporting, then I had trouble with Simpe. Now that my mesh is finally showing in CAS, it seems like it is there, but not there. There is some change in texture (I see lines down the arms and shoulders) but the sim has exactly the same proportions. I can't see what is wrong. I know you can make bigger sims, because my pointy-chested sim was bigger, but why didn't it work for me with my good mesh?

Anybody know?