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I understand your confusion. I'm not an electrician, and the NEC requirements are so convoluted and full of references to other sections that I have trouble with it. You can go to your library reference shelves and read section 810 of the NFPA National Electrical Code® to see for yourself.
Why they want separate grounding wires for the mast and the grounding block is a mystery to me, but that is the way the code is written. My guess is so that there are separate paths to drain any buildup of static charge to discourage a strike, but your system will not survive a direct strike.
Even dish installers connect the mast (or mount) grounding wire to the grounding block.
My concern is for personal electrical safety, which is why I want the coax grounded.
You could hire a local electrician to help you. He would know the local requirements in your area, if you want to adhere to the code.
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