Hey, so two things:
1) If you have a bad start, obviously it is harder, because you had a bad start
But you have to consider that you are going to play the following rounds with weaker player, making it easier in that aspect. With a couple of win, you climb the standings very quickly.
2)This is kept open because we don't want any dead time during the rounds, and it is impossible to determinate how long every round will be. What you wrote will not be possible, because the last round will be announced in advance. Let's say we are starting round 9 and we still have 45 minutes on the clock. All right, we will take the decision that round 10 will be the last. So every player know that they have those 2 rounds and no more. The last round will be announced in advance, that is the point, considering the clock. At that time we also have an idea of how long the rounds are, making the decision quite easy.
I should probably implement this explication in the rules.
Thanks for asking
Nic