Just a stab in the dark. Try selecting the object and then mesh>clean check all the boxes for non-manifold, laminar faces, faces with zero area and edges with zero length.
Also goto vert mode and select the entire model and be sure you do not have any floating verts
If that fails, if you don't mind sharing the model, compress it in a zip file and upload it and I will be happy to take a look at it to see whats causing the additional geo.
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675
Last edited by ctbram; 30-11-2013 at 05:04 PM.