I also raised the issue with the help center and basically got a "that's the way the system works" response. I said I understood that, but the "system" was also showing me 5 star rating on my stats page. I got the response that this was the recent 90 day number used for Super Host status. Of course, I then pointed out it says "Overall Rating" not "Last Quarter Rating" and that there's a whole separate page for Super Host status which shows the last quarter rating. Anyway, since I wouldn't give up (in a friendly way), the agent said he would bump it to a supervisor. Still waiting on that... 🙂
I'd be happy if they just showed the guest that 5 stars and showed me the number with the decimal points and the number of reviews at each level. The "system" can be programmed to show the guest a number which is rounded to something that isn't so odd, like 4.99.
My 2 cents...