I noticed today after re-setting up my channels installation that when I create a virtual channel and then try to change the channel number it won't let me delete the default number that is created when you first set up the channel. I delete it, then it just pops up again. I can add a number to the existing default one just fine, but can't seem to get rid of the default.
I tried this on Safari browser from my MacBook and chrome on my windows machine. I have tried refreshing the page and trying again but no luck.