Honestly, so does Florida's law in so many words. They are already talking about revising it, before the investigation is even complete. Completely sackless politicians here.
See, this is where I differ with you. Someone pulls a knife on you, you should be able to shoot them, no questions asked. Not try to run away and get hit by a car fleeing because you couldn't defend yourself with the weapon you had on your person but couldn't use. That is the POINT of stand your ground.
Under your first scenario, even though you didn't initiate the confrontation, you had to flee the confrontation rather than end it there.
If they are going to change ANYTHING about the Florida SYG, they need to put wording in there to the effect of "law not valid if you initiate the confrontation, initiate pursuing the individual, etc.
Not getting back to the Sanford case, there was a case recently where an off duty SECURITY GUARD followed what he thought of as a "suspicious vehicle" on a public road, they turned down a dirt road, the 2 guys in the car stopped, got out, confronted the security guard and he shot and killed them both from inside his car. One or both of them was unarmed, and he got off. I really think that is a stretch and he initiated the pursuit. You don't go looking for trouble. If the "current" story in the Martin case turns out to be the truth (Martin jumped Zimmerman, but Zimmerman was following him), I don't think I can fault Zimmerman for actually shooting, but he should not have been pursuing Martin.