There, to my amazement, shows my previous track's circuits and landings missing the runway and landing on top of Sasol 3

Downloaded the upgrade - GPS shows empty. ( Same feeling when you fiddle with the camara and wipe out a year of pics)
Plug back into P.C, send data back to GPS - OK! My tracks show where they were supposed to be.
Why would the GPS loose accuracy?. No, my brats did'nt fiddle and could probably solve this before me.

Now after searching, can't seem to find my allocated waypoints, mostly bush strips or that were'nt previously loaded with the established 'FA 'strips.
Have seen GPS co- ords of the relevant strips offered on the destination forum, but hav'nt been succesful in loading.
Can someone explain in slow English how do download (capture on USB to take home) download on PC to make sense and send to GPS 96C.
Also can't find the correct South African map. When I select 'Nearest airports' it suggests somewhere in central Russia or the States. Some of the maps on the 'drop down' have numbers, but no welcoming 'South Africa'
Short of this, I'll try " When all else fails, consult the (does'nt explain) manual or contact the agents. ( Courier up and down, pay them money and still not know how to fix)
Thanks