Hi there Mattyoakers!
Thank you for posting in Apple Support Communities. It sounds like you haven't been able to track your sleep using your Apple Watch and iPhone and the the stand and move goals are still reflecting the previous day. We have some tips that may help.
If you haven't already, make sure that you update both iPhone and Apple Watch to latest versions available. This ensures that they benefit from any improvements available. For steps, look here:
Update your iPhone, iPad, or iPod touch
Update your Apple Watch
If you are running the latest OS on both, restart your iPhone and Apple Watch. You can find steps on how to do this here:
Restart your iPhone
How to restart your Apple Watch
If you are wearing your Apple Watch while you sleep, make sure that the band has the best fit. Look here for steps: Wearing your Apple Watch
If there is no change, turn Sleep Schedule off and back on. If unsure how to access that setting, look here under "Edit your sleep schedule on your iPhone": Track your sleep on Apple Watch and use Sleep on iPhone
Finally, delete and recreate your Sleep Schedule.
If your sleep data is different from the Sleep Schedule you've set, reach out to the support Advisors for additional troubleshooting. Contact them here: Get Support
We hope this helps.
Cheers!