As others have pointed out to you, the data indicates that you had 173 OAs during the entire night, and that it works out to an average of 31 apneas per hour.
On an diagnostic sleep study, an AHI greater than 30 lands you in the severe OSA category. So clearly your therapy is not yet optimal. Out of curiosity, what was your AHI on your diagnostic sleep test?
As I recall from another thread, your old Escape was set to 10 cm but your titrated pressure was actually 13. That goes a long way in explaining the bad data here.
Now for a "how to read my SH data" lesson. Let's look at this window you posted:
Do you see each of those light blue tick marks in the Events table and superimposed on the Flow Rate graph? Each tick mark indicates the exact time one of the 173 OAs happened. Some of the tick marks are thicker than others because the OAs were happening so close together that the individual tick marks run together.
The machine was turned on at 0:37. The first cluster of events starts less than 30 minutes after you go to bed. That's probably way too soon for the first REM cycle unless you have some kind of REM-related disorder as well as OSA, but you haven't said anything about that. So That's probably not what caused that cluster.
Were you still awake around 1:00? Had you just fallen asleep? And did you fall asleep on your back? Those are all relevant to figuring out why that cluster of events was recorded.
The second large cluster that starts at 2:30ish might be REM. But the cluster lasts longer than a typical early in the night REM cycle does. Again, the question becomes, were you on your back? Were you restless?
The very last cluster that starts around 5:30 might also be REM related. Or supine sleep related. Or restlessness.
But I think the most likely reason there are still so many OAs being scored is that your AutoSet is set to 10cm and your titrated pressure is 13cm.
In the long run you're likely going to need more pressure. Since Auto mode on the AutoSet really disturbed your sleep and you are feeling better now that you've switched back to CPAP mode because you are at least sleeping through the night now, it's reasonable to have a plan to slowly
work on titrating the pressure up where it needs to be long term.
I would suggest that you consolidate the sleep right now: The dial winging in Auto mode caused some serious sleep problems as I recall. So you need to get at least 3-6 more days of sleep at the current pressure before you do anymore dial winging. You need to be extremely comfortable with sleeping with the PAP at 10cm before you increase the pressure up to 11cm. After you bump the pressure up to 11, if you have no trouble sleeping at 11cm, leave the machine set at 11cm for another 3-4 days and then bump the pressure up to 12cm. Again, if you continue to sleep ok with the machine set at 12cm for 3-4 nights, then bump the pressure up to 13cm.
If you have serious problems sleeping at a NEW pressure at any point in this process of slowly increasing your fixed CPAP, try lowering the pressure by only 0.5 cm instead of 1cm and see if that's enough to allow you to once more sleep comfortably with the machine.
The idea is to make slow changes to the PAP pressure so that you continue to feel like you are sleeping all night long. As you continue to sleep with the machine and slowly increase the pressure your AHI should start to come down. By the time you have been using 13cm for a week or two, your AHI should be down in the normal range (below 5.0).
Since Auto mode was hellish for you, it's important for you to keep your eye on the long term picture: If it takes you a few weeks to gently train yourself to sleep with the pressure you need, you'll be better off just doing that rather than trying to dial wing in Auto mode creating additional problems with your sleep and never getting to the point where you can comfortably sleep with the machine set to a pressure range that is therapeutic for you.