hmmmm... well, I believe there is definitely something weird going on here.
I am having the same problem with a completely different setup. My TM Cougar HOTAS is also requiring many re calibrations to fly straight. It wont "hold" auto pilot, it drops auto takeoff after 2-3 secs, and will arbitrarily constantly bank right. (I watched your film, Clone and that is exactly what my stick is doing!). If I recalibrate it will work fine for a short time, anywhere from 10 - 20 mins and then start acting up again..its really quite maddening. This is also occurring after the recent updates, maybe for 4 or 5 weeks now.
At first I thought this was an isolated problem with my stick since I have modded it pretty heavily (Hall sensors, uberNXT gimbals, etc.) - I figured maybe a wire had frayed or something..took it apart, everything OK, back together, OK for short time (~10 mins) then s.o.s. I borrowed a stock, unmodified Cougar hooked it up, calibrated and tested in game - initially it was rock solid.. so I figure my Cougar is porked somehow..but how could the Hall sensors mess up? I thought they "don't go bad" ? Then after about maybe 20 -30 mins the other Cougar starts doing the same thing!
So I come to the forums and do a search and find that this seems to be a significant problem. Whats also interesting is that its apparently happening across the board (with some variance) to all brands; Saitek, TM, CH and even Logitech too, I believe. Taking into account that some of the problems could be hardware -worn pots or whatever, logically it seems improbable that ALL the remaining calibration issues are individual hardware problems??
The same symptoms in multiple different configurations?? There has to be some common factor, something we all have neglected to do or set or consider that is causing the stick setting configuration to not update? Could be some combo of factors?? Powered hub? Sensitivity setting? sound setting conflict??( I remember something about weird joystick - sound interraction..?)
I dunno, its starting to hurt doing all this thinking. Maybe the really really smart techno-computer guys can take it from here and help us mortals out?