Only because he had a double-digit lead in the absentee ballots. He lost among those who voted yesterday.
In Louisiana, Trump achieved close to poll expectations, sometime better. The difference was voters abandoned Rubio for Cruz.
As for how the delegates are divided up, you can bet it is crooked. This is, after all, Louisiana politics.
It was Louisiana elected Republicans who are mostly responsible for the new democrat governor, including, as per this site, the sainted Jindal.