JDRB, if you have some pull with your doctor and DME, get a Resmed Airsense 10 Autoset. Otherwise you're doing very good with a fixed CPAP. The reason the Autoset is so superior is that it changes pressure with your needs, whether they come from a cold, a few drinks or sleep position. It does this while being much more comfortable due to the use of very effective exhale pressure relief (EPR), similar to using a bilevel. The EPR has therapeutic applications, but can provide exceptional comfort as well as effective control of hypopnea, flow limitation and RERA. Your CPAP is a decent one with good data, but if you ever tried the Autoset, you'd never go back.
Your efficacy is very good for someone starting out. The trend is usually for improvement in time as you adjust to the therapy, optimize your settings and sleep accommodations. I agree with Walla that the cluster of apnea and hypopnea on 3/9 at what shows as 08:15 is probably positional. Some people occasionally tuck their chin or find a sleep position that results in poor airway alignment, and that is not really the fault of the CPAP machine. If it becomes a regular feature we can give you some tools to deal with it.
If the time on your therapy charts is off, you can fix that with some simple offsets for time in Sleepyhead. The Philips Dreamstation does not give you access to the clock, so you do it in the software. Go to the Menu in Sleepyhead, and click on the menu File/Preference/CPAP, and set the clock drift.