"I" don't claim unerring understanding. In fact, "my" understanding is imperfect, in error, and incomplete. Understanding comes from the holy spirit.
Scripture is God breathed, God inspired. So the first rule I use in trying to understand scripture is believing what scripture says. And scripture says that the interpretation of the vision in Acts 10 is this:
Act 10:28 And he said to them, "You yourselves know how unlawful it is for a man who is a Jew to associate with a foreigner or to visit him; and yet God has shown me that I should not call any man unholy or unclean
This is what Peter, in the bible, says that the vision meant. Can you show me where Peter interpretated his vision in any other way?