I just upgraded from a Tactix Charlie to a Tactix 8 Amoled and noticed that the amount of REM sleep seems to be way underestimated every night. I actually have always had very vivid dreams almost every night and the Charlie appear much more accurate. The Charlie would estimate me between 1.5 to 3 hours on a nightly basis and since getting the Tactix 8 it is telling me every morning that I am not getting enough REM sleep and estimates it at 20 min to an hour if I'm lucky. I am using the same watch band and wearing the 8 exactly as I wore the Charlie. Has anyone else noticed this and is there anything I can do. I love the watch, but perhaps an software update will fix this and other bugs I've noticed.