I may be disabled, but I haven't forgotten the lessons learned during a 20 plus year career in computer and network support. So, the first thing I do with new equipment like a CPAP machine is to double-check the settings before I use it. In this instance, my new machine showed the incorrect time. I used the forum to download the technician's manual so I could open up the settings and correct it. I found that the DME provider forgot to erase the SD card before setting the date. So I erased the card and set the time. I also changed the machine from CPAP 14 to Auto, setting the boundaries from 14-18, assuming my "titrated" setting should be the lower bound. I did all of this before using the new machine for the first time. Interestingly, I've found the machine auto-titrating to 16.3 several times. So it seems the autoset is doing what it's supposed to.
All has gone well with the new machine until today, (November 25, 2015) which is day eight of use. I pulled out the SD card to read it with Sleepyhead and Rescan just for giggles. Both show the last day of usage as November 19, day 2 with the new machine. Yet the machine's built-in diagnostics correctly shows eight days of use. My first thought is to erase the SD card (again) and start over. Anyone have any better suggestions?