Yes, I ran into the same issue and was able to do it.
1. Hughes DSS remotes somehow throw 2 IR info every time you press the CH+ or CH-.
2. When learning this IR's from the Hughes, press the button on the remote that you want to learn away from the learning window then rapidly press it again and now this time put it in front of the learning device.

In other words, you want to learn the second info, not the first one. It worked for me. Let me know how it goes.