Issue in Maya. I delete half of my model, but pieces remain.

Screamheart

I need to figure out what is happening here. I also need to figure out how to add polygons to the little circle in the middle. 

slosh

Not sure exactly...I think the model is a bit corrupted.  I would combine it with a sphere and see if that works.  

Screamheart

I will try that, could you explain how?

Bartalon

Make sure you are deleting one side using Face Mode, not by vertices or edges.

To add faces to something, you can use a variety of tools.  Fill Hole, Append to Polygon, Bridge.

To combine your shape with another shape, just select the two objects and go to Mesh > Combine (then delete your construction history).  This will force the model's vertex order to reset and might help with deleting those floating polygons.

Screamheart

Thanks guys. I may have figured out the issue myself. The model was originally in ZBrush, and I exported it again without polygroups. Thanks for the other help though.