Model Issues

My model has issues. I started out with a model that looked like this (see attached file one) and when I exported it using Dex exporter and then converted it to .mdx format from .mdl format, it turned out like this (see attached pic 2) I had no problems with the model not appearing in worldeditor. I have no textures on the model except for the default one, and i have only one animation (stand) on the model. I've no emitters and no anything else. What happened here? The unit appears in worldedit just like in pic 2! But it used to look like pic one!!!! (by the way, there's no texture problems going on on the model, it just seems like my geometry had somehow become corrupted or something...