It does indeed change the world seed to get the map to change. Still, the properties of your embark location should always remain the same on every reroll, including the biome. Not sure what issue you are having, could you explain more fully?
Also, I guess I could set the world seed back to what it was originally was after each reroll, in case it does affect something I'm not aware of.
Also, I guess I could set the world seed back to what it was originally was after each reroll, in case it does affect something I'm not aware of.