I've come to a time travel glitch while doing the vampire route. was this reported? if not, here's steps to replicate it.
Humilem Village: upon entering the maze and following the road you go N, W, N to the bee hive area (where honey barrels are located). enter the small cave then exit, go back from whence you came and the road to Humilem is gone. Once you leave the maze and back into the world map you are back in the past before becoming a vampire, except you don't get to keep your old inventory items before turning. You do however keep the visual vampire sprite but every action and every enemy is as if you were a human. You are also "allowed" to visit all the places before becoming a vampire as well.