Server map seeds

Has this changed for good? - Our servers land changed after the roads update and is much smaller. Is there fix/way to get it larger? or is the seed totally random?

You should be running the same seed, however the roads update I think also changed the way the terrain was generated resulting in an entirely different looking map from what you were used to. This prompted us to move away from a seed we had been using for months because it had changed so much.