You and other LDS are the ones hung up on the Body issue, despite Jesus' clear teaching that "God is spirit" (John 4:24). The fact that Stephen could see both Father and Son together has never been an issue to the historic Christian church. It's only an issue to folks whose founder is famous for his "strange God anyhow" statement as he probably tried to imagine the Father's head stuck onto Jesus' neck with each operating a limb...etc.
Since the Father has no physical body, yet can manifest Himself, there's no issue at all of two manifestations, who are still one. I am one with my wife. We're still two manifestations. So what?
Luke 24:39
Behold my hands and my feet, that it is I myself: handle me, and see; for a spirit hath not flesh and bones, as ye see me have.I am one with my wife. We're still two manifestations. So what?
Finally something we can agree on, (in addition to the apostacy thing) he said the same thing in his prayer to the father for His apostles:
John 17:21 That they all may be one; as thou, Father, art in me, and I in thee, that they also may be one in us: