Sleep tracking on Health

When going through my sleep data in each of the last six month, my avg. time asleep doesn’t go past 7hrs. Yet, when I switch to the last 6 months view my avg. sleep time is over 9 hours, which makes no sense. When I go to “Show More Sleep Data” and choose “amounts” instead of “stages” my avg. time asleep changes to around 6 hours, which makes much more sense. Is there a way to fix that?

Thank you!