The winkling of new citrus leaves is not all that rare of a condition. The cause is simply genetic, and therefore not caused by anything that you as the grower has done. It does not effect the health of the tree. Looking at the pictures that you have provided, your tree has very good color and looks to be a healthy tree.

Regarding the jagged/misshapen edges, I do not know the cause; perhaps, yes it is genetic?

However, IME the majority of time the wrinkling shown in the 1st picture is due to small pest damage early in the life of the leaf. Many times it's aphids or thrips on the underside (or even inside) the leaf that have since moved on, otherwise resolved by predators or climate, and thus are no longer around. High levels of Nitrogen in the soil do give nice green foliage but tend to invite such pests.

As to what actually caused the damage, I doubt there is a way to know for certain at this point.

If it's a minority of leaves, I'd ignore it. But if it's taking hold on most new leaves also, I'd certainly pay *very* close attention to the underside of your newer leaves as they are not easy to spot.

Here is a link that might be useful: An example of aphid damage