Were Moses and Aaron cut off from their own people?

In Leviticus 18:29 NIV, it states as follows: > Everyone who does any of these detestable things—such persons must be cut off from their people. And in Exodus 6:20, it states as follows: > Amram married his father’s sister Jochebed, who bore him Aaron and Moses. Amram lived 137 years. Since marrying your father's sister was considered a forbidden act by God, does this mean that by doing so, both Amran and Jochebed caused their sons to be cut off from their own people?