Comodo Secure DNS IPv6 Support

I have Windows 7 Sp1 64-bit and Comodo Secure DNS doesn’t work with IPv6 enabled so i have to disable IPv6 and stay only with IPv4… I have three questions…

1. It’s normal that i have this problem?

2. If it’s not normal to i have this problem how i can resolve it?

3. In the future will supported IPv6 connections from Comodo Secure DNS?

Thank you…!!!