Do you mind putting up the file for us to look at? The shells problem is probably the one causing the issues, inverted normals can, but usually only causes issues with rendering and sometimes pricing. The Mad Moder
The red indicates an inverted normal, so your main problem is that the model is entirely inverted (a pretty common problem translating from skp). The other problem is that its not unified, and comprised of around 184 separate shells.
Upload the model here in the forums as an attatchment and I'll have a squiz for you.