Why lost on time?
Hey, I've had the same problem! I was 100% sure I put my vacation-mode on in a knock-out tournament. When I came back, I had lost 7 of 8 games due to time-out, and I resigned the remaining game because it made no sense to play it.
This is very anoying because those time-outs made my time-out ratio higher than 10% which means that I can't participate in tournaments... while actually the time-outs weren't my fault...
So please fix that! 
Well, I thought I had just moved in all of my games. But, maybe not because I was positive that I clicked the save preferences button(it jumped out at me after I didn't get it right the first time)
But, as a suggestion. I think it would be nice if it would tell you that you are not being put on vacation for that reason. As opposed to it telling you you are on vacation and then not doing it. It just doesn't seem to make sense.
Sure Patzer24, here are the links:
http://www.chess.com/echess/game.html?id=6639364
http://www.chess.com/echess/game.html?id=6639365
http://www.chess.com/echess/game.html?id=6639374
http://www.chess.com/echess/game.html?id=6639367
http://www.chess.com/echess/game.html?id=6639358
http://www.chess.com/echess/game.html?id=6639363
http://www.chess.com/echess/game.html?id=6639369
The 8th game of the tournament I resigned myself.
We have checked on this for you and we do not see any errors in the system with your vacationing. In the future when you go on vacation you can always "Contact" us using the link at the bottom of any Chess.com page to confirm that your account is actually on vacation so that a circumstance like this does not occur again in the future.
I set myself to vacation and when I came back all my games were lost on time. VERY frustrating.