So I had two games recently that ended in an unexpected way. One (or more) of the allies forgot to show up!!!
The first case was me. I didn't show up. It was a fasting, and since I wasn't sure who to nominate, and had a small crisis on my hand, I decided to take care of it and come back later to vote. Well, I missed the train, and one of my allies was kicked outa there! Our alliance was crushed! Luckily though, I ended up in the final 3 (everyone on both alliances was either inactive or evicted).
And today, it happened AGAIN. Two members of my alliance went missing, and a smaller group kicked our asses.
The lesson? Vote when you can! And stay in the game!