@Michelle53 What I meant by cross-reference was to click on the host's profile, then scroll down to see the other reviews he has received from other guests. Then click on some of those guest's profiles to see the review that host left for them. He may leave the exact same cookie-cutter review for all, unless they were objectionable guests.
And if the guest you have received the booking request from only left one review for the host, that's not an indication that he only stayed there once- repeat guests may decline to leave reviews for any but their first stay at a listing, as they figure, what more could they say?
Of course it could be some review glitch, but there's many possibilities aside from that.