HK Airport Express Travel Pass 2 singles

Hi, if I am visiting for 6 days can I do this:
Day1 arrival from airport use 1st single
Days 2-4 use 3 consecutive days of unlimited travel as per above conditions
Day 6 2nd single back to airport.

So, my question is when does the 2 consecutive days start - from the airport express usage or from the next within city usage (in this case the next day)? Thanks for your assistance