Issue in First Example of a Rule: Wolfram Physics Project Tech Background?

Questions
1

I recently found out about this project and was reading through First Example of a Rule: Wolfram Physics Project Technical Background.

At the bottom, the VertexCount is said to be 2^(n+1) for the n-th evolution. I believe this should be (2^n)+1

WolframModel[{{{1,2}}->{{1,2},{2,3}}},{{1,2}}, 6, "VertexCountList"]` gives `{2,3,5,9,17,33,65}

How do I go about suggesting this correction?
Thanks.

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