Character Model Issues, 3D scanning And More

To start with class, we did 3D scanning in class and I decided to scan myself since I didn't bring anything on me to class besides my flash drive. I seriously want more class time to mess around with the scanner and the mesh mixer program because I serious loooove.
I still don't know what is happening to my model, I tried to redo it but it keeps going in on itself every time I pull it up and sends me this warning message:
I then moved onto finishing my box model of Beemo and finished multi cutting the shapes:


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