That was the way Tracey recommended and I say if it works for you then go with it! The reason many choose to do it the other way around is that they found that if their LO had a long am nap then it was hard to fit in a pm nap and hence cause OT by bedtime and NWs. You may find as time goes on that you hit the same problem so a short am nap might be better. For now, though, go with what is working best and reassess the situation if your LO starts to wake in the night or early in the morning.