Yeah, that's what I thought of the movie when I first saw it too; I couldn't sit through all of it. But it eventually grew on me and now I think it's one of the better vampire movies out there.

Gnomes have a network of underground tunnels that connect to every place on the entire planet. We can't use these transportation tunnels because we're too big. As for how he came to be employed under me - Gnomes are always looking for work; it's hard for them to get a job because they are discriminated against.