I think you should change this to:
A: The time “in-between scenes” may be a separate scene as adjudicated by your chronicler, just as long as the time between written scenes is at least 5 minutes.

with the underlined part optional to leave in or not

Again you are pointing specifically to a printed adventure, maybe we need to specify "when running printed adventures?"

believe it or not, some people may not even know we have a living campaign

(I have meet some)

is there any reason this does not apply to home choniclers?

because the chronicler crafts the Scenes in a home game, there should never be a "moment between scenes" is honestly a mistake by the writer. Any time you see it (without notation) is a published game, it's an over site, and.. in many ways... the nature of the beast

As traveling between two points is it's own scene with the plot point being the arrival. In a home game you already know its a new scene and treat it as such.

then why include this notation at all, instead of doing away with it as "behind the scenes"

You lost me :p

let me abstract the argument

I like your original ruling, except your mandating the "in between scenes" Scene. My original suggestion was to make that extra scene optional at the discretion of the Chronicler.

and then we digressed into whether this applies to home GM's or not, I dont have a lot of stock in that either way, however i am more interested in the "extra" scene being optional and not mandated.