We've been looking at buying the Phil & Ted's sport buggy with double kit but when we went to see it in Mothercare, the frame for the kit looked really uncomfortable. It looked like the baby will hit his head on it as he grows up as the actual seat part seemed to go under the top bar of the frame. Is this right or is there padding that goes over the frame? Has anyone had this problem? Or was it just a poor model we saw in the showroom?