@Jillian115 yes, I noticed that too. In your case, the map seems to skew toward more available listings (there are a lot of them in Sonora).
I also noticed something similar (but more extreme) a few weeks back in a new host's listing in Wokingham, England. In that case, when you search for a place in Wokingham, England, Wokingham is not even on the map! Very strange...You have to move the map significantly southeast to even have the town show up:
https://community.withairbnb.com/t5/Help/New/m-p/1456676#M318715
In that case, narrowing the search by date does not help at all.