Yeah, o.k. I can see wanting a second master if it's meant to be more like a guest/in-law suite. But I don't get it wouldn't just be called another bedroom; how is it billed as "two master bedrooms?" Is it because it has an en suite bathroom?
When I was thinking it was weird, I was picturing it more like, hmm...., which of my master bedrooms do I feel like using today? Oh, I think this one. I'll use the other one tomorrow....