Occam's Razor is that out of multiple explanations, the one that requires least amount of additional assumptions is likely to be true. If you have some other idea of what it means, do tell.
I have shown that your scenario of Zimmerman running around the townhouses to cut Martin off and chase him back to the T requires more additional assumptions than him simply staying at the T and Trayvon turning back on his own. So application of Occam's Razor in this case means that the latter scenario is more likely.
So you do know what it means but you are applying it wrong. Occam's Razor in this case says that the person who was pursuing will continued to pursue, and the person avoiding/evading will continued to avoid/evade.
Fact: Zimmerman was the pursuer from the start. He even left his truck with a loaded gun to continue to pursue. We have no reason to believe that he suddenly changed his mind and went to look for an address instead. Moreover, in his mind he was pursuing someone who he believed was heading for the back entrance. Everyone agrees he ran across the top of the T to Retreat View Circle. Given that he was pursuing, and that he believed Trayvon was heading towards the back entrance, we have zero reason to believe that Zimmerman would reverse course and head back to Twin Trees Lane. THAT is the additional assumption. Occam's Razor supports the assumption that Zimmerman continued down Retreat View Circle for at least the length of the first building (six townhouses wide) before he cut back into the alley behind the parallel rows of townhouses.
Except that he did not turn back Twin Trees lane immediately. He stayed at RVC for at least a minute, which makes sense because from there he had a line of sight to the back entrance. So yes, that's an additional assumption, but rather small and reasonable one to make.
Your scenario on the other hand assumes several things that we have no evidence for but just have to presume to make it work:
1) That Zimmerman dropped his keys and his working flashlight at the T for no reason (as opposed to dropping them when meeting Martin)
2) That he would not only venture down RVC, but also between the houses, through the bushes and trees that were planted there, and chase Martin back up towards the T, in the dark without his flashlight.
3) That he would have the determination to both run down RVC and through the buildings without any hesitatation whatsoever even he did not see where Martin was, just on an assumption.
4) That he would made up a completely unnecessary lie about him going back to towards Twin Trees lane, and getting punched by Martin at the exact location where he dropped his keys, and which would not be contradicted by witnesses who might have seen him going down RVC, between the buildings, through the bushes, etc.
I don't see how making a simple assumption that Zimmerman stopped at RVC (when he had already stopped once before, at the clubhouse) would be somehow less plausible than the ones your pet theory requires.
Fact: Trayvon tried to avoid/evade from the start. It is an additional assumption to believe Zimmerman's ridiculous claim of Trayvon circling his truck. It is also an additional assumption to believe that Trayvon suddenly reversed course in the back alley to return to the top of the T. It doesn't make any rational sense why he might do that, and requires a whole bunch of unsupported assumptions.
Trayvon though he'd evaded Zimmerman already, and it was dark, so it's hardly irrational to think that he might have turned back from the path between the houses to proper sidewalk and get back home that way. Besides, as far as Trayvon knew, Zimmerman was on a truck on Twin Trees Lane and the patch between the houses crosses with Twin Trees Lane. It would have made perfect sense for Trayvon to turn back to
avoid Zimmerman, not to confront him.
Quite frankly, though, looking again at the crime scene map I'm thinking Zimmerman's actual lie was ever making it as far as Retreat View Circle. My original assumption was that he did because he made such an issue about the back entrance. What makes more sense is that he started across the top of the T for that reason, but then spotted Trayvon about 50 feet into the T and took off after him again. This would explain why Zimmerman's key chain and small flashlight were about 40 feet north of the body near the top of the T, but his bigger flashlight and Trayvon's cell phone were found several feet south of Trayvon's body.
Maybe, but that would mean Zimmerman did not reach the T until end of his 311 call. So why couldn't he tell the address where he was at? All he had to do was look at the number on the closest building. And why would he say that he went all the way to RVC, when he could have said Martin ambushed him on his way there? And if he told the dispatch he was following him, where was he then? Did he stop following when instructed to do so?