When dimensioning a drawing done in paperspace I sometimes get dimension errors. For instance I can dimension something that is 1" and it will show up as an 1/8" or some other fraction. I can then dimension another item that is 1" and it will show up correctly as 1". If I go back to the incorrect 1/8" dimension, delete it and start the dimension from the other end it will show up correctly. I have never experienced this before. It has just recently begun and to my knowledge I haven't changed anything. I'm baffled. What would cause this problem?