I can tell you did not have a titration test, right? Your doctor set up your machine with a low pressure and will do exactly what we are doing here until he finds the pressure range that works. We're just going to get there faster and easier. It is unusual for a doctor to limit maximum pressure to 7.0, and we most often see a range of 5-20 for initial auto CPAP titration. It would not surprise me if there was an error in setting up your Auto CPAP.
The easiest way to understand this is to understand what is in a CPAP titration protocol. I will post the Philips CPAP Titration Protocol below. As you can see, the initial pressure starts low, but if obstructive events (OA, H, FL), are observed then we increase pressure. The protocol continues until obstructive events resolve, or presure is not tolerated. The Resmed protocol does the same thing, but I think it is more understandable.
We observed your initial chart with Auto CPAP where the starting pressure was 5.0 and increased to 7.0 for a significant period of the night. Events did not fully resolve at 7.0, so we can infer that your ideal CPAP therapy pressure is likely higher. We can take a more conservative approach and increase the minimum to 6.0 and maximum to 9.0. The objective is the same, to find out what pressure range results in relief of obstructive events and is comfortably tolerated. Your machine is actually slow to proactively increase pressure to prevent events, and we know Philips users need more minimum pressure than Resmed users to get good results, so my recommendation of a minimum pressure of 7.0 was based on the observation that at that pressure, you still needed higher pressure to fully resolve events. Thus my suggestion for 7-10.