why does my watch think I am in core sleep mode while I am reading? How can I make it more accurate to my actual sleep?

Hi milkworm,

As noted in the following article, if you feel your readings are inaccurate, look over the following to get more accurate results.

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

"Get more accurate results with your Apple Watch

If you paired your Apple Watch after completing Sleep setup, you can still turn on Track Sleep with Apple Watch. In the Watch app on your iPhone, tap the My Watch tab, then tap Sleep. Then tap Track Sleep with Apple Watch to turn on this setting. To get the most accurate results when wearing your watch to sleep:

• Turn on Charging Reminders. On your iPhone, open the Watch app and tap the My Watch tab, then tap Sleep. Tap Charging Reminders to turn on a reminder on your Apple Watch to charge before your Wind Down time. If your watch battery dies, it won't track your sleep data.
• 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."

Additionally, ensure both your Apple Watch and paired iPhone are updated to the latest respective version of their OS.

• Update your Apple Watch - Apple Support
• Update your iPhone or iPad - Apple Support

Take care.

You're most welcome, milkworm,

If you've already verified that your settings are correct to track your sleep, we would suggest that you reach out to Apple directly to investigate this further with you. They'd be best suited to help. You can reach them here: Apple Support

Kind regards.