Why is that Inmarsat either got it all wrong or all right? Especially when I can not find a single report backing up your claim that Inmarsat claimed any knowledge of it being on autopilot or not. There has been lots of speculation about if it was on autopilot or not but nobody knows and nobody has made any claims to that effect.
This is what Inmarsat actually said
The new method "gives the approximate direction of travel, plus or minus about 100 miles, to a track line", Chris McLaughlin, senior vice-president for external affairs at Inmarsat, told Sky News. "Unfortunately this is a 1990s satellite over the Indian Ocean that is not GPS-equipped. All we believe we can do is to say that we believe it is in this general location, but we cannot give you the final few feet and inches where it landed. It's not that sort of system."
http://www.theguardian.com/world/2014/mar/24/flight-mh370-inmarsat-aaib-analysis
Although it sounds highly likely autopilot was on, no one has a clue as to if it was on or not.