I'm having trouble trying to get the eyes to skin all of a sudden. i made some adjustments to the model and started over from scratch and now when i set the skin weights to 100% on an eye it moves the eyeball inside the head. also on another note the UpperJaw is rotated 90 degrees to the characters left. what am i doing wrong?

What is your workflow with bones placement?
Did you adjust the bones and then did skin weight?
Try the opposite (you might need to reset bones). Skin weight first and then center bones to eyeballs.
See if this helps: https://forum.reallusion.com/FindPost540564.aspx