Babies born at 37 weeks - and wonder weeks

If your baby was born at 37 weeks have you noticed that they hit spurts and leaps 3 weeks later? I got the wonders week app and I'm not so sure it is correct. I entered my LO with his actual DOB but also created another "kid" but with his due date since supposedly leaps are counted from that day. Well, this is what I got now, the "first" kid it in the second week of Leap 2 and the "second" one just started leap 3. And I fell like neither one is correct. He is not a great night sleeper so when everyone complains how bad the sleep was during leap 3 and they had to wake up every 2h, well that's my night every night. What are your experiences with the wonder weeks? How do I determine where is he at?!