Removing channels from a custom created channel group



I created a new custom channel group called ‘Favourites’ using the Group Manager feature and assigned some channels to that group with no problem.
I then decided I wanted to remove 3 channels from this group, but couldn’t find an option to remove a channel anywhere. Initially, I had thought this could be done by highlighting the channel and pressing OK on my remote, which did remove the channel from the group, but when exited the group manager and then re-entered, the channel I thought I had removed was back again.

In the end I solved the problem by deleting this custom group completely, then re-creating it again (minus the channels I didn’t want), but I was wanting to know if there was a much simpler way to remove channels from a custom group that I’ve somehow missed?