To do something "in the name of" someone is to be an agent of that person. You are authorized to act on his behalf. If the Oneness tenet is correct that Jesus is the name of the Father and is the name of the Son and is the name of the Holy Ghost, then you guys are correct that baptizing in Jesus' name is the same (i.e., is obeying the command) as baptizing in the name of the Father, and of the Son, and of the Holy Ghost. But then, it would
also be correct (i.e., it is
also obeying the command) to say the words "in the name of the Father, and of the Son, and of the Holy Ghost". If one is right, they are both right.
Personally, I find it really hard to believe that God is confused about who the preacher means if he lists the "offices" instead of says the name "Jesus". I think He's smarter than that.