My Activity "Stand" time is filled every morning after wearing the watch to sleep while this is obviously incorrect.

Hey Erik_HD,

I understand that you are having issues with stand time accuracy on your Apple Watch. I can also confirm that I am having this issue while tracking sleep on Apple Watch Series 7.

Apple Watch uses advanced algorithms to confirm whether or not you are standing, sitting, or resting. And in some cases, it can incorrectly identify whether or not you are standing.

Apple is constantly updating these algorithms with frequent software updates. So Make sure your watch is up to date before proceeding with any other steps.

As I've been made aware, Apple Watch automatically calibrates when you do 20-minutes of an activity, such as going for a jog or taking a light walk. However, resetting your watch may still help.

Sincerely,

Triston

Make sure that you're wearing your Apple Watch at a comfortable fit. If your watch is too loose, the accelerometer might register too much movement during your natural sleep. For more info, see:

Track your sleep on Apple Watch and use Sleep on iPhone - Apple Support

If you pair your Apple Watch after setup, you can still turn on Track Sleep with Apple Watch later.