During the flashback, it is 1860, but tombs in the crypt have later dates. 1879 can be seen on one, as well as other wrong dates.
Around 16 minutes into the movie, when Tim Carter (Jimmy Murphy) is drinking at the bar. The breakaway bottle that he is handling starts to leak out onto the bar before he breaks it.
When the sherriff confronts Dolores when putting up the first poster, she says she will continue putting them up until Carter gets what's coming to him. Carter is her family name, she should have said Buffer.
For a vampire, Drake Robey spends an unusual amount of time in direct sunlight.