Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
Perhaps, at an initial guess, the software 'rounded to 16ths' at some point.
But I'd rather not guess, so I need to ask, please: What software are you doing this work in ?
Try going to
Style and Standard Editor (if it exists in your version).
Make sure that the
field in the Default Standard branch, in the Units tab,
is set to
not to some larger quantity.
I am sorry to hear that. I have no further suggestions to make, and am Opting Out of this case, opening it to other Experts - specifically those that know AutoCAD software and its settings and configuration as a running program.