Showing abilities much earlier than the leaps


So we’ve just come through leap 2 and have 14 days until leap 3, but my son is already doing 90% of the abilities that he’ll be mastering after this next leap. We are going by his due date as the app says to do but he was very early- should we expect to see some leeway on the dates? Leap 2 is for roughly 8 weeks old but our son was 16 weeks old so it’s quite a difference.