And the humorous or sad part depending on ones point of view, Malaysia claims of altitude over land has been a moving target. Reports of 5,000 to whatever. One thing i am very certain of, it was never less than 13,000 feet. And what i do know, most likely higher. And as far as routing, Thailand ATC is only acknowledging the airplane's path south near the border of Malaysia and Thailand. Saying it never ventured into Thai airspace. They are quiet on any turns toward Phuket and the Andaman Sea. So even the announced flight path is brought into question.
The handshakes from the satellite gave it two options, the northern route would have taken it over northern Thailand. We know for certain that did not occur. It never entered Thai airspace.
Yes, of course. Tactical radars (not saying these were) have a high pulse repetition frequency, which limits their range since the reflections don't return before the next pulse is transmitted, but within their range they are very accurate. We don't know the exact capabilities of the radar used to track MH370, and they probably wouldn't share it publicly anyway. I don't blame them.