Thanks for your detailed message.
I am not in a position to answer your questions because I do not have the detailed knowledge to do so. I believe the whole area around cannabis and indeed many other drugs is confusing and over-complex. Like many MPs and others I would hope that the government commission a Royal Commission or something similar to try to clear up the position.
My message to Surrey residents and Surrey Police is very clear however: I expect the former to obey the law, and the latter to enforce it.