If you're on a dedicated server, you can't use any sort of sorter or filter to determine what biome a biome crystal belongs to. Its name will always show up to the sorter/filter as "Biome Crystal" rather than its full name like "Biome Crystal (Plains)". Both Integrated Dynamics and RFTools Control can be used to reproduce this. This is a consequence of fixing #276 via 37cd644 instead of by retrieving the biome name in a server-friendly way.