I've never used those phone app things for logging data. I have a good handheld scanner and my laptop for things like that. So I can't comment on why some channels don't show up or seem to read right when you log them.
These cars will idle around 18-22 degrees if I remember right, that is normal. Most modern cars now will run that sort of timing. While under normal load the timing will be 20-40 degrees or more just bumming around. Full throttle timing should drop down to 14-18 degrees give or take, if lots of knock is present even less timing.
