Spare Tire problems of the 2006 Honda Accord

On July 17th, 2010, I had 4 brand new falken zeix ze 912 installed on my car. Approximately 5 miles from the dealership, while driving on the freeway, the front right tire blew out. See odi number 10344123) today, August 14th, 2010, while driving down the freeway, the left front tire blew out. I had the spare tire put onto the car and drove to the dick hanna Acura of portland, oregon; the dealership that installed the new tires on July 17th. The dealership reported that they could tell from observation that the car ran over a pot hole which caused the blow out. I explained that I was on the freeway and there were no pot holes. I also stated that it seems bizarre that a tire would not be able to hold up even if there were pot holes on the freeway. I reminded them that it was only one month ago that the right front tire blew out. At this point, the tire will obviously have to be replaced. The dealership did not have the appropriate tire in stock thus still has by car until at least Monday. This appears to be a huge red flag with these tires. I requested that the dealership review the tires and give me a written confirmation that all the tires are safe prior to me picking up my car.