No...don't raise the EPAP. If anything lower the EPAP min to 4 or 5. Good call on the PS min to 4.
In Sleepyhead be sure to check for signs of leaking, mask or mouth. Look for inconsistent spikes or trends upward or downward. Then would correspond with increases in flagged events.
I’d love to use sleepyhead, but it’s not currently compatible with the respironics Dreamstation AutoSV that I have. I’m kind of groping around in the shadows. Not quite totally in the dark, but close.