Go4 App and CS....strange readings

[RickMz]

New with CS and was checking the readings on my Go4 flight data when I found my drones don't quite fly as high as I thought....
The following are the "Top Altitude" readings reported on the left-hand (summary?) side of the Go4 app flight data screen:

Spark: -116.9 ft (Yes, minus)
M2P: -2.2 ft
P4P: 94.4ft
Air: 11.0 ft

When I look at the individual records, in every case they look correct (eg much higher than the summary report as I have flown up to 400ft).
What am I missing?
Thanks for the help / advise.

 

[PaulRC]

On my CS, they are different too, but not negative. For example, I flew from the top of Mt. Evans, CO and my CS says my top altitude is 14,400 feet while the flight logs show the top altitude for those flights as about 300'. So in that case, the CS is reporting the actual altitude of the MP and the flight logs are showing the delta from take off.