Well if its not clearing chans its a prob perhaps from the SVR end and if you have re-scanned and not back, I would leave it to see if they come back in the meantime
Rescanned then flashed with the new v1.04 firmware which doesn't work at all!! Put the original grooverider v1.01 back on reflashed and set up evrything as before but still missing channels!
like I said it sounds like a Svr issue, I would give it some time in case its not functioning properly and needs to be looked at