I am trying to dimension a "simple" part.

Some of my dims show up looking like this  10"

Some of them look like this    10.000

On the same part and in the same view. And I haven't changed any setting between making one dim to the next. I am trying to get ALL of the dimensions to display in fractional inches with the inch "tick" marks behind the number.

Any ideas about what is causing this? Any ideas how to fix it?