^I think the air freshener story is 100% bollocks. Even if the chapel smelled musty, the smell of the flowers would've overcome that!*
I suspect it went something like:
Meghan "I have an idea about maybe scenting the chapel; its something we sometimes do in the US"
Courtier "i'm sorry that won't be possible"
Meghan "okay no worries, was just a thought"
regurgitated 6 months later on a slow news day and embellished to further discredit Meghan.