chiefie: It DOESN'T save what I last arranged... I gave up trying to reorder to my preference as it is too dumb to retain my sorting order!!!!
I emailed the author of the software about this and he told me that to get reordering to stick, what you have to do is hit 'edit', move one of the channels, hit 'done', then repeat the process. He didn't realise this bug until it had been submitted to Apple. As NZBullet said, I can vouch that the author is a very decent guy who is working flat out to improve this app.