@Michelle1851
Michelle, it's hard to give a definitive answer to your review problem because Airbnb keep on changing the format and the workings of the site, all we can do is give an answer relating to our experience. What I am about to say may not still be correct......but it used to be!
With regard to review placement, the formula is a little complex!
Reviews, as seen by the guest, are displayed in order by the nationality of the guest.
What this means in basic form, you may list in Colorado in the USA and all English speaking guests will see your English/American nationality reviews chronologically displayed....they will be seen in order starting from most recent.
If someone from Germany looks at your listing they will see any reviews given by previous German guests first, and these will not be in chronological order. If someone from China is looking at your listing they will see previous Chinese reviews of your listing first.
This was done by Airbnb to make it easier for guests from different countries to assess whether your listing was a suitable fit for their culture.
It is possible the nationality of your guests could have something to do with how your reviews are displayed.
Cheers..........Rob