UPDATE I was able to talk to a Supervisor at the X10 Tech Department prior to sending the last three cameras back. After I explained the situation, the Supervisor had me send the cameras directly to Renton. In Renton, the cameras were tested and found to be defective. X10 in Renton is acquiring new cameras, from both their warehouses in Nevada and New Jersey. The date codes will be checked to ensure they are different from my cameras Once Renton receives the new cameras, they will be tested. If the cameras are O.K., Renton will send me the new cameras.
In my opinion, X10 has been very cooperative in helping me solve this problem once a Supervisor got involved. It's unfortunate that it's taken so long before a Supervisor would get involved. More info. later.