T.S.
I own a stroller fitness company and we have many moms who have the Phil & Ted's Sport with the jumpseat attached to the back with the infant seat in the front. Some of the confusion may be that it's a European designed stroller and most European parents don't believe in infant car seat carriers, so it's original design was for the infant to be papoosed in the main part of the stroller with the back down and the jump seat attached to the front. In the last couple of years as they've become more popular in the US they have added the option of an attachment for the jumpseat.