1st night with S9 VPAP Auto, not great

You did have a couple of little clusters last night. Probably supine sleeping or REM stage sleep or both.
If this persists (see those ugly clusters often) then probably a little more minimum pressure is needed to help out those higher pressure needs time.

Check PM box. I sent you some information on ResScan. Give it a try. Doesn't hurt to use both if you wish.

Quit worrying about centrals. Some centrals are normal and expected and only a problem in excessive numbers.
Yours don't appear to be excessive and it's too soon to worry even if they were excessive.