Its prob the phil & teds that you're thinking about.....

I say this because when you have a newborn plus a toddler the seat is unzipped & drops so its flat & the extra seat is clicked onto the front, so it looks like the front one is the pram seat because its lined up that way & the newborn is unzipped underneath.

When the newborn gets older & ready to sit up thats when the extra seat goes on the back

I hope that helps

Reading this back it sounds a bit confusing.... just let me know if you want me to explain it better LOL