I was noticing that, too. It's good to have it confirmed that this isn't normal here. You would think the dust and the sand would start to mix, wouldn't you?

[It seems like 'normal' is something different everywhere he finds himself. Kurama brushes a bit more of the dust aside himself, frowning down at it thoughtfully for a moment before shaking his head. He kneels down and dips a finger into the dust, rubbing it thoughtfully between his finger and thumb, testing the texture.]