In the past few years, I have been noting different views and methods of water baptism. Many denominatiions around here (Mennonites, Church of the Brethern, Amish) stem from Anabaptist immigrants (Anabaptist refers to not baptizing infants). Most will not say that Baptism saves anyone, but they say it is an expected act of obedience.
There are those that say that if you were baptized in the name of the Father, Son, and Holy Ghost, you need to be baptized again, specifically in the name of Jesus they cite the book of acts such as Acts 10:48.
In the Church of the Brethren, one is immersed once in the name of the Father, Once in the name of the Son, and once in the name of the Holy Spirit. They also bow forward for each immersion rather than leaning back.