I am amazed that you then turn around and say the wording of those instructions don't matter, and are just semantics, whether it was "we don't need you to do that" and "CEASE AND DESIST FOLLOWING THE BOY".
As other posters have indicated, it wouldn't matter anyway because Zimmerman is not required to obey the commands of a police dispatcher even if they had instructed such a thing.
But to hang your hat on the supposed command uttered by the dispatcher, then when it's pointed out it's not a command at all, to brush it off as semantics... amazing.
I agree that the dispatcher may not have had the legal authority to tell Zimmerman to cease and desist.
However the dispatcher still speaks with the Voice of Authority.
Most people, when told by a 911 dispatcher not to do something, won’t do it.
What’s so hard to understand?