I have a couple of questions regarding the riseman a/b functions. I have set the reference barometer to my current berometer. Will it now adjust to be more accurate as the weather changes. Also wouldn't that make the altimeter more accurate? My location is about 880ft above sea level yet my altitude on the riseman reads 700ft. Before I adjusted to my actual barometric pressure it read 29.05, the actual pressure is 29.95. Is there anything I need to be concerned about?