1. Voting from offsite... Sorry no. We can't do that.
Let's say you voted someone early to avoid a UD. Then you read something from your phone before night happens that makes you want to change your vote. If you sent me an email from offline to change it then, what... I'd post the vote change for you? No, we can't do these games like that. Plus, what if I can't get online until 2 hours later but players think your vote switch is a scum-tell. Timing is also a factor there because others might switch theirs based on your vote change.
Once you make a vote, it has to stay until you come back and change it yourself.
Nightfalls are going to happen during the evening hours... 9 pm Eastern/6 pm Pacific. In order to play and not UD, you'll have to be able to place a vote (even a randomly chosen vote) at least once after one nightfall and before the next.
This is a problem for me too, btw. In most games now, I end up having to vote way too early before leaving for work or I'll UD. Then I can't watch the thread or change it from work.... can't get back to even see the thread until after nightfall has come and gone. That really sucks, I hate that part.... but it's either put up with that or don't play anymore.
2. Um, here's where I have to say I don't remember which game that is without more info. (Was I in it? lmao.) I've been in so many they tend to blur together.