Last night, I called in and had them do an upgrade (DIU) for a 4000 receiver to a 510. They took down whatever information they needed (CC#) and said it'd be 7-10 days for delivery. I check my account today and find that they took 50.00 off the monthly bill (it's just listed as "payment-thank you"). Is this what they normally do with a receiver swap-out (ie they'll tack the 50.00 back on when they ship the "new" receiver out) or is something amiss here?