Hey coletc,
It looks like you already checked out the article about getting the most accurate measurements using your Apple Watch.
Have you also tried restarting your Apple Watch to see if it makes a difference? If not, here are the steps below:
1. Press and hold the side button until you see the Power Off slider.
2. Drag the Power Off slider.
3. After your watch turns off, press and hold the side button again until you see the Apple logo.
If your Apple Watch is charging, take it off the charger first. When your watch is charging, you can't restart it.
If it doesn't let you restart your device, try force restarting it: Restart your Apple Watch
Let us know how it goes!
Best regards.