You had a crappy night of sleep. Multiple wake ups and even mask problems. If you have much REM component to your OSA it's doubtful that you got much REM last night.
I had a bad night last night too and I haven't even looked at the report because I don't need to.

Had trouble going to sleep because I knew some thunderstorms were on the way.
Woke up about 2 hours after going to sleep with itchy foot that was bugging me and I got up to check on the status of the thunderstorms.
Was up about 30 minutes and went back to bed only to be woke up again by the neurotic dog terrified of thunderstorms who was telling me it was thundering 2 counties over.

So I might have got 4 hours if I add it all together. My butt is dragging this morning because this was the second night of short sleep because of thunderstorms. We had some the night before at around 3 AM.