looks like the things are controlled pretty well.

pillows often leak with high pressure settings. your pressures are not really very high. do you wash them every day. usually if the seal is poor, the starts leaking. if it bothers consider a nasal mask.

what is your back up rate?

The question is why you are mouth breather. Why is your nose always blocked. May be you should get that fixed first. See and ear nose and throat doc I think

Do you clean your mask regularly. With usage and fax wax, it starts leaking