Hi Tiffany,
In the absence of an official response all I can say is that I have noticed this behaviour from time to time from V9 onwards but it has never presented as a major issue as it doesn’t always happen for me.
Have you tried a registry reset? This will require you to redo all your preferences but is the first thing I would try.
Also, I find that the default Display Settings can present a confusing amount of measurements so I tend to set these up with the minimum amount of automatic measurements and then save this back as a default. I then add manual measurements in wherever neededed and these do not seem to change (or at least rarely). The Display Settings schemes are very powerful and well worth learning how to use. With a few different display schemes stored, it only takes a few clicks to select the best scheme for any particular design.
