Searching by price produces results that are sometimes bizarre! On occasion I have found the 'Price' option yielding fares several hundred dollars higher than one or more of the results under "Schedule'. Another fun game is to select a routing from the "Schedule" options and get the fare and itinerary with the addition below of some much cheaper or slightly cheaper itineraries --which DID NOT appear when searching the "Price" . Go figure.
Flyer 420