Can you post the Picture of drawing (to show exactly what happen after modify the part).
According to your statement, In drawing Position of drawing view will suffer more then dimension position because change in ucs or origin position.
There is no such way to reset all dimensions but you can use
Auto arrange in drawing to speed up you work.
auto.png 31.8 KB
Are you manually placing dimensions in your drawing, or are you importing them
through insert model items? I can't see this happening with the later.