Discount just covers their rear, the tire didn't look good to them so they didn't do the work. In their mind that is better than doing the work, then you have an issue with the tire and blame them. I am sure they have been down this road several thousand times and have arrived at the procedure they use for a reason.

I really like discount tire, I have connections and can get tires at cost and install for free. But the service, speed, and warranty from discount is worth it. They rotated and balanced the tires on my wifes old durango in 12 minutes one time. I have been able to watch the grass grow at too many other tire shops to go anywhere else.