First of all, do you use a shader? If yes, then there might be an error in that shader which causes the offset textures. If you have no shaders applied to the model, then you've posted in the wrong part of the forum hhehehe..

Have you tried exporting and importing to a different format?

I use the .3dS format all the time and have no problems with it, and since your model itself seems okey, it must be an import/export problem. Did you update to the latest version of A6 and tried the 'engine preview' within MED? Does it look correct there?

Cheers