To be the "Lord" in 1 Corinthians 8:6 is to be YHWH (God).
1 Corinthians 8:6 yet for us there is but one God, the Father, from whom are all things and we exist for Him; and one Lord, Jesus Christ, by whom are all things, and we exist through Him (NASB) Although sometimes referred to in order to demonstrate the Lord Jesus is not God, 1 Corinthians 8:6...forums.carm.org
I suppose if you are going to make up your doctrine out of thin air, you might as well go big.
You claim that Paul didn't know how to communicate. What he actually meant is
yet for us there is but one God, the Father, from whom all things came and for whom we live; and there is this additional God, Jesus Christ, through whom all things came and through whom we live.