Like I said I don't know when they have to be in a landing configuration, and how far out they are when they are in that configuration. I also don't know what approach they were doing, which my explain why they were aligned with the wrong runway.

However I still dont see why it is news worthy, the fact is that nothing happened. They landed on the correct runway, whether or not they would have had the controller not said something is up to debate, and something we cannot possibly know.