Update on problem 2:
Justine model:
"Duplication" was a nooby mistake. Imported my model into my already open project of the model, causing "duplication". However the exported model looks as if it had swallowed a grenade. The mesh is all "explody".
What I have found on the matter:
Export model without weight painting: Looks all fine.
Export model with weight painting: Mesh ruined.
Can you try to weight paint something and observe the outcome?
As for the duplication on the girl model I think I have sent you the Maya file a while ago. Try exporting it and examine the results.
Edit: Noticed that it sounds like some sort of homework. I am however grateful for your help