I am using SkyDemon together with MSFS2020 on an iPad for flight planning and flight following and have a few questions...

1. Why does the altitude in SkyDemon always show as approx. 100ft less than the actual flight altitude?
2. Is there a way to bookmark AIP charts for anticipated departure and arrival, so that I don't have to navigate through the 'Airfields' tab during flight?
3. Is it possible to assign an alarm to a waypoint? e.g. TOD
4. How do I quickly set a new Altitude on the flightplan during a flight, e.g. ATC give me a new altitude?
5. Why does the Wind column in the Pilot Log not show the same METAR Wind data that the Airfields tab does, assuming I am flying direct from one airport to another?
6. Where can I see the Heading in degrees for runways? It doesn't appear to be shown on anywhere except the AIP charts.