I'm getting another series 2. I want to pay for a subscription on that rather than on my s1 that currently has a subscription, can I do the 'change tivo service number' on tivo.com to transfer the subscription or do I have to actually call in and cancel the s1 sub and start a new sub for the s2? I know it's only a few dollars, but I'd rather not pay for two subs that overlap or cancel and lose 2-3 weeks of service on a sub that I was just billed for a couple of days ago.