Some of you were baptized in a Roman Catholic congregation or a Baptist congregation or a generic Christian congregation. Some of you were baptized in the ocean. Others in a pool. Others in a font. Some of you were baptized by people who didn't even believe Baptism did anything.
Salvation is messy.
God is gracious. Baptism messes everything up. Talk to people who have been baptized as adults or those who have recently affirmed their baptisms after being away from church for a long time. They will tell you that Baptism changes everything. When you are born, nothing is the same again.