I just tried to order a second Hmc receiver. my plan was to replace 2 receivers with the second Hmc receiver. I directv told me only one per home? Do I just need to keep calling until I find someone willing to sell me another one? I see no technical reason for two HMC's not working, but could be wrong. Any thoughts? I paid 199 for the first so was hoping to get the second one for the same.