The file "ReachSpace.cfg" tests for an impossible condition and also doesn't retain it.
Find where it says
targetBody = Kerbin
situation = FLYING
minAltitude = 69999
You obviously cannot fly above the atmosphere!
Change this to:
targetBody = Kerbin
situation = SUB_ORBITAL
minAltitude = 69999
Then, the next line, change
disableOnStateChange = false
to
disableOnStateChange = true
This will make the parameter actually achievable, and will set it to retain it.