Hi JB
Any channels you store on the 'other channels' on sky are deleted after several weeks. I've rang sky about this but they fobbed it off as a problem with the box. Not true because lots of other people are having the same problem. My theory is the conspiracy one. Sky are obliged to provide this facility for when or if you terminate your contract. I stored about 15 other channels and lost them all, about 8 times. Now I just keep the code beside the t.v. and if there's something I want to watch I just tune it.
It's very frustrating but good luck if you get any joy when you call sky.