We actually decided to discontinue the "Type 2" curves with darker shadows, and now only offer the standard Gamma 2.2 linear curves. If you wish to have darker shadows, images can be edited to get the results you want.
Thanks for pointing this out so we can update the custom curve page and instructions to remove mention of the "type 2" curves.
I hope this helps, please let me know if you have further questions or there's anything else I can help you with.
Best regards~ Dana