My opinion as well as for your future reference regarding rating mechanism:
1) 5-star status = 6 items x 5 stars = 30 stars
2) My total stars per your ratin (Website hidden by Airbnb) stars
3) Thus my overall = (Phone number hidden by Airbnb) or 87% or 4-star (not 3-star)
4) However, you irrationally threw in an overall of 3-star, which = 60%
5) To make the 60% stand, you need distribute a total of 18 stars (not 26) among the 6 items (3 stars for each item) or give zero to Accuracy, Location, leaving the other 3 items as '5' which you gave).
6) Then divide the 18 stars by 30 stars (i.e. 18/30) and will get 0.6 or 60%
7) If I were you, I would have rated the host a 4-star, not only for a correct ratio ( (Phone number hidden by Airbnb) % or 87%), but also for recognizing the widely used and accepted 3% or 0.03 tolerance level for each item rated in rating systems.
8) How would you rate yourself in terms of Accuracy, (understanding) Location and Communication? Recall you came in approx. 10pm apologizing for being late due to TRAFFIC and events in SF. Later you asked me about morning commute time to SF from my home . I did say you will run into very heavy traffic and would take about 1 and a half (1 1/2) hours. Knowing that you already experienced the SF traffic that night, I believed you would adjust the estimate accordingly per your situation. If you didn't want to be late in that morning, you would have increased the commute estimate by 30 minutes, 1 hr, or 2hrs, etc. rather than taking a non-guaranteed estimate or best guess of 1.5 hours. It was your decision to make - to sleep more or to allow more commute time :) !
9) The reason you got 5-star from me just like all my guests except 2 guests is that, as a rule of thumb, I always apply the 0.03 professional tolerance level to assure fairness is sustained rationally :).
Best regards, Grace