Trying to book a first class award

MIA to FRA or DUS or ZRH end of April

so I go on Aeroplan

6 different options under

First and Others

MIA to CLT First on uS Air then economy to MUC

points 125000 a person

but if I go business class

MIA to ORD business on United then ORD to FRA business on LH

it is 90000 a person

this always happens now because US air calls their crap business class First and the points jump up

Anyway to filter out any flight involving US airon the aeroplan site?