I've grilled two big batches of hot dogs on my argentinian grates; I struggled enough with the first one to consider getting a set of flat grates but I just angled the dogs about 30 degrees for the second batch and that minimized rolling.
Ah ha....I see you have a Scottsdale. Wonder if yours is angled different than the OP's. He says his is angled so the grease will collect at one end.
I did the "angle" trick that you're employing on hot dogs with one of my grills when the expanded metal meat rack humped up in the middle after getting too hot. It worked as long as you didn't walk away. As soon as you did, they would roll off onto the ground. :mad2: