You have some hidden geometry.
In this order.
First: Open the andymodel.blend file
- Go into edit mode.
- Press " a " to deselect everything.
- Press " ALT-h " to " un-hide vertices.
- Press " x " and select delete vertices.
- Press " w " to remove doubles.
Also… the mirror modifier slightly overlaps down the center of the model.
Still in Edit mode. Choose the mirror modifier.
Turn off tab " apply modifier to editing cage during edit mode "
Then select and pull all the vertices slightly to the left.
You will see what I mean.
Also… in the " crotch " area of the model there is a 5 sided face (Ngon), that will have to be cleaned up at some point.