Blargh...
so now shutter displayed is the photo shutter, ie wrong
shutter in the ML menu is for some reason converted to a small version the real ADTG shutter range when FPS override is on, so wrong
the range is like fps - ~100 but you get values like 101.2, etc when checking via ADTG gui it looks like we have the whole range just its displayed completely strange
so....
right now don't trust the shutters displayed so much in video.
So looking at it further maybe something with base frequency + shutter timer.... if you copy the base from other cameras you get different fps calculated stock, right now it shows 29.985 which sounds like its a bit off from 29.97