A-Flex/C-Flex strange behavior

I have read through the threads on Dreamstation C-Flex/A-Flex, and I understand that on this unit I am not setting an exact pressure relief level... and the unit uses your respiration levels to decide how much relief to provide... but, I would still expect that a lower number would provide less relief, and a higher number would provide more relief... not what I am seeing.

I had min/max pressure set at 9.0 and A-Flex at 2. I saw anywhere from 2.0 to 1.6 relief pressure... OK.
Last night I changed the min/max to 8.0 and also changed the A-Flex to 1 thinking that it would give me less relief and still end up around 7.0-7.4 for relief... but found that relief was always between 6.2 and 6.5. Lower than I wanted to go. And this created about 40 hypopnea events, which were non-existent before.

Would C-Flex give me closer to the 1.0 change or will the C-Flex change be to the same level but just not as gradual as A-Flex?

I assume that hypopnea events start/are caused at exhale? So the lower exhale relief pressure probably allowed my airway to close and caused the events? Is this clearly telling me that I need to stay above 7.0 at exhale?

I am thinking it was the change in the minimum pressure that was the primary factor in the increase in events.

Use which ever Flex option and setting which happens to be the most comfortable for you and adjust your minimum pressure setting for optimal results and quit trying to second guess how much actual exhale relief you will get. You can't predict the amount of drop because the drop is flow based and you may not be breathing the same all the time.

The minimum pressure is always the most critical pressure setting (with or without any exhale relief) for keeping the airway held open.