Cannot change channel order in channel playlist

Something strange happened on my Solo2 box (using Black Hole 2.1.7) : When I found a new channel and added it to my Favourites playlist, I wanted to change the order and move it from the last place in the list to a place in the middle. I marked the channel and then pressed the menu button as usual , but the option called "activate move mode" was not there any longer, just the other options like "remove this channel" etc. How could this suddenly disappear ? I have restarted many times but this option does not reappear. I can rearrange the order in my channel list by using a settings editor, but would very much like to be able to change the channel order on my list like I have always done. I would be grateful for ideas/information on how to get this option back without having to reflash the image.

Thank you for the information - I probably have to reflash the image after all. But I still wonder why this happens "out of the blue". As stated above I can rearrange the order by using the Dream Editor - I have in fact done that already. But I find it a bit more inconvenient, and I am a bit curious why this can happen. Interesting though to see that others have had the same problem.