It's being reported[1 - NYT] that the 107 "turn off time" is inaccurately quoted. It wasn't that the system was turned off at 107, as much as the next expected report at 137 was not received. This leaves a 30 minute window during which the system was disabled. Note also that the last voice communication was at 119, so it could have been disabled after that. We simply do not know.
That is part of the problem with any analysis of what could have happened.
We don't know for sure if all the input is correct as reported. The old garbage in garbage out.
We don't know if the background checks (some of which are complete some which various countries haven't even released yet) have issues. Everything is speculation based on fuzzy information.
All we know is what is reported and we don't know how much of it is actually correct. Which is what your comment illustrates ""turn off time" is inaccurately quoted".
Much of the information coming from the Malaysian officials tasked with communication is confused or inaccurate. Naturally it's unclear whether this is a case of "right hand not talking to the left" or broader incompetence, but I think you're right to be conservative in building hypotheses atop this information.
[1] http://www.nytimes.com/2014/03/18/world/asia/malaysia-airlin...