Double Air Barrier – GreenBuildingAdvisor

Designing my own passive house inspired home in 4A. The kitchen and living area will have scissor trusses. I recently found and attached a roof assembly that uses a double air barrier and scissor truss am an wondering if this is a problem. Specifically as you move towards the peak and there is to cellulose on the underside of the roof sheathing and the roof is airtight. Not sure if this is a concern or if I am overthinking this.

The second attachment is my modified version with materials that I have access to. Should I remove the roof Zip and use plywood with a highly permeable peel and stick to increase the ability to dry to the exterior or is this not a concern?

Finally, I am assuming that I should (or it would at least not cause a problem to) install and vapor diffusion port at the ridge so that any trapped moisture can get out into the 2×4 ventilation space with no resistance. Is this a correct assumption?

Thanks in advance!