There is a set of points at the departure end of Market Street where you can go straight on to Piccadilly Gardens or turn right for Mosley Street, as Mcr Warrior has just posted. From there, there is only one track leading to each place.
Not sure why this might be, but I'd guess because in this busy pedestrian area the driver can ensure there is nobody standing on the points before calling them to the correct setting, all during the stopping time at Market Street instead of having to stop between tramstops if the facing point was closer to the triangle. It also increases capacity a bit, as a tram can go towards Piccadilly while another one is waiting on the parallel bit if some other move is preventing it continuing onto Mosley Street.