I'm pretty sure the SIM does favor certain spots in the batting order for stolen base attempts. Lead-off is definitely one of them. However, I set almost all of my players to 0 for stolen bases, and I've never seen the SIM attempt a straight steal with any of those guys, no matter where they hit in the batting order. The only time Kelly or McGraw or any of those high-volume/poor success rate guys steal a base for me is when it's part of a hit-and-run. Sounds like a ticket is in order, assuming your SB setting really was at 0.