1) on UA.com screenshot, you're getting the continuous pricing on some of the economy fares (it'll show U9 H0 on expert mode, but UA quoted H fare)
2) google.com/flights is supposed to support continuous pricing, but some reason it's not working on this ?route/dates? (see link below)
3) matrix does not support continuous pricing at this time (see link below)

https://www.flyertalk.com/forum/unit...-pilot-13.html