Any other question that is not specific to an aspect of development or tool can be posted in the General chat forum.
By following these guidelines we make sure that the forums remain easy to read for everybody and also that the right people can find your post to answer it.
No actually not. I need to wrap my brain around this a bit more to see how I want to proceed next. I just didn't want to seem ungrateful for everyone's help by not at least acknowledging where things were left off-- even if I haven't exactly found any answer. So I thought a summation was in order. Sorry if it was taken that after everyone's help, I was just giving up.After all that and you are not going to investigate whether there's any effect other than the potentially false indication?
Jon,Do a Google on Transition Altitude. E.g. http://en.wikipedia.org/wiki/Flight_level#Transition_altitude. 18,000 (FL180) is the transition altitude in the US. Other countries have different transition altitudes. Above this altitude altimeters are set to a standard barometric pressure of 29.92 Below that you need to set your altimeter to the local barometric pressure as advised by ATC or other weather services.
You can also Google the altitude restrictions associated with Visual Flight Rules. The main one is that planes flying under VFR must be in clear air and cannot be in cloud. I am sure that are some ultimate restrictions on VFR altitude as well which will depend on airspace restrictions, clearances and so on.