I was practicing building a monster as described by the book and I noticed that the Rattlesnakes subclade seems to be miscalculated? I might be misunderstanding things, but their "hunger: blood (u:2 p:2)" seems to be added in as if it were an entirely new bane, rather than an enhancement of the base vampire template's "hunger: blood." This pushes the Rattlesnake template's final cost up from 6 to 9, making them a fair bit deadlier.