Michael,
1. I have been, because of previous problems, been extremely careful that I only click on ends etc. I am beginning to believe that MoI does not truly believe what the little notations for clicking say? (I admit to being less than perfect--but!)
2. I have, previously, had an excellent relationship with importing 3Dm, Iges, and Lwo into Carrara--I have reported , to DAZ, that previous problem which you said was a Carraras fault.
3. However, if you note the OBJ import of that file (See the 3DM screen shot), which is identical to the LWO import, and then there seems to be a gross distortion, WEIRD, to the IGES file compared to the 3DM import.

Something aint right in Kallamanzoo!