For the first, it's up to you, especially whether or not you distinguish between votes and readers - I think most quests consistently get a great deal more Ratings than Votes for a given update, even when voting is still open, and some Voters don't necessarily give ratings. (I will point out that despite having six votes, you have seventeen Watchers, so you seem to have at least some audience who aren't participating, and that obviously can't count people who aren't members but may still follow the story as it goes on.)
As for why your quest might have fewer voters than other quests - there are a lot of potential answers. They might not like the writing style, one or both of the fandoms, they might not know enough about the scenario to vote, or they might just be waiting to see if the Quest actually gets off the ground. Lots of Quests start, and quite a few die young for various reasons.