NGCcoin.com displays only your coins that are "competitive" or currently eligible for competitive sets. The Collection Manager functionality and Custom NGC Registry Sets are still available on collectors-society.com. We plan to move the programming to NGCcoin.com in a future release.
You may also access Custom Sets from the NGCcoin.com home page here,
1. Click on Resources
2. Choose NGC Registry from the drop-down menu
3. Click Browse Custom Sets.