Are there one or two baptisms?

There are existing three main types of baptism in Christianity, and the scriptures do not place a mandate as to which type must be used. The Word baptizo in the Greek means to wash and has no implied meaning of immersion.

The three types are: immersion, pouring, and sprinkling (in order of most water to least water used.)

The practices of sprinkling began in areas where water was limited or unsafe for baptism by immersion. While immersion is ideal considering the metaphors used in scripture to describe it, there is no requirement that one must be baptized a certain way. Those who mandate immersion baptism do so based on inference, not Biblical mandate.