I didn't have this problem until i added a couple new biomes. i would generate the world, and the entire world is one biome. I've teleported all over and just flown around but it is still just one biome. when i change some of the size settings, the biome that covers the entire world changes. is there an easy explanation for this? if you need more details, tell me.

We would need to see your biomeConfigs to really know what is going on. I've never experienced your particular problem but it sounds like the biome size settings might be messed up or possibly a mis-config'ed WorldConfig.ini file. Make sure you are using the most up to date version of TC from dev.bukkit.org.

Also, If you are new to TC, I would suggest starting from scratch where you do the following (assuming you are using Bukkit):
1.) Install TC fresh w/o too many other plugins.
2.) Setup your world in your bukkit.yml like here so you are JUST making a default TC world.
3.) Then add the customBiome Names and ID's to the WorldConfig.ini and restart the server (this will let TC create the configs for you.)
4.) Now edit the configs to your liking.
5.) Go back to your WorldConfig.ini and add/remove biomes from the Biome Lists section directly below the custom biomes section.
6.) Delete the world and restart. Hopefully that works...

gl,
-- Time

Thanks. i'm not using bukkit however. i'm going to try using a different world and see if the biomes return to normal. for all i know i may have deleted something i shouldn't of. thanks.

Sounds good, let us know if you need further assistance :D

I tried it. i must have messed something up cause it's working now. Thanks a lot for your help!