Then they asked for a king, and God gave them Saul the son of Kish, a man of the tribe of Benjamin, for forty years.
Acts 13:21 ESV
Wrong tribe, wrong king, but God gave it to them. The people asked wrongly, so God gave them wrongly, just as James wrote: "You receive not, because you ask amiss."
When you read something in the Bible and struggle with it because what you read conflicts with what you have been taught, a choice needs to be made. Trust the Bible or trust the person who told you something different. Psalm 119:142, “Your righteousness is everlasting and Your law is truth.” Don’t be afraid to check different Translations or ask questions and when you are satisfied you have verified a proper translation, believe the sacred word of our Creator.