Urology has become extremely competitive with many applicants. There has to be some weed out system because there is no way to go through as many applications as most programs get in a timely fashion. You have a lower step I score, but you're bolstered with research and presumably good score on your rotations. This is where away rotations really help. This advice may be too late for you, but for those earlier in the process I will post it anyway. This is the chance to get your foot in a door on an away rotation. Sure, someone who doesn't know you will screen your application out during the interview process, but if you do an away and knock it out of the park there's a face and work ethic now associated with that application. That's how you can overcome a lower step I score. Now, if you have a low step I and poor clinical grades it's going to be tough, but if you have a single deficiency an away rotation can gloss it over.
The application process sucks, man. I don't think anyone can argue with that. I wish there was a way to change it, but right now it's the game that has to be played.