Hi. I've been flying my p3p every day now since I got it last week and I am noticing that the altitude is not very accurate. Is this normal? I take off and as I ascend it seems to be ok but I move down range, ascend and descend and when I bring the drone back and have it hovering in front of me about 10 feet high, my altitude is reading like 39 feet. Now if I Have it in my sight, I am visually flying not instrument flying, but I have been testing limits and if i fly it out 2000 feet or more at an altitude of 150 feet and then lower down to below 100 feet to "look" around and the drone is not in my field of view, a difference of 30 to 40 feet vertically could be disastrous. Thoughts? Opinions? Advice?