I didn't try to go through with booking, but united.com finds all of the flights and prices it out to what I think it should be.

The only thing it is doing incorrectly is this: 3/4 legs are on C/Y planes. The other is F/Y. I want CCCF, but ual.com finds CCCY when I tell it I want business. When I tell it I want first, it doesnt bring up anything.