JDS74 wrote:Since you are using SleepyHead for a data display program, have you looked at the session list to see if there are actually two sessions?
Alternatively, take a look at the file folder on you SD card for the data files. If there is just one set of .001, 002, 005 files with last nights date on them, then it is a data error.
To look using Windows, start Windows Explorer and navigate to the SD card, and then click on down to the p0 folder (or P1, P2, etc whichever one is last). That contains the data files. Scroll down to the end to see how many sets there are for the most recent date. One set => data error, more than one set => somehow the machine got turned off and then back on.
If you are using a Mac, I'm of no help on how to do it. Navigation should be similar.
If there are two sessions and you didn't do it, then definitely the aliens visited in the night.
Are these the numbers you are talking about? If so, it looks like the machine was turned off and then back on, but I'm stymied - I don't believe I did that, and there's no one here but me, not even a cat or a dog.

Also, the times are all wrong on the whole day.... I got up at 5:15 AM so I could catch an early bus to get to the clinic for some appointments and didn't get home until 11:30, at which time a took a nap with the machine, then got up to have lunch before going back for another appointment. Needless to say, I was exhausted by the time I got home at 5:00 PM. I slept well. Must've been the aliens!
Now using AirFit F10 mask; Quattro Air is backup mask. RemZzzz mask liners with both.