I’m not at the DAW so can’t check, but I think the spelling will be related to the scale you use and to the Preferences set I think. Try setting the Scale to A Major and see if it still uses Dd. If it does, then, yes, that’s odd. Also, the Preferences can be set to Flats or Sharps. I use flats as my default as I work more in Flat Keys than Sharp Keys. I’m not sure if this will change anything but I’d try that.
I think the iOS has some issues that are known by the developers.
I get some odd spellings, but they are mostly a question of scale used and Scaler giving me synonymous spellings of Chords – I call it a Minor 6th, Scaler calls it Minor 7b5… stuff like that.
It’s possible that this “glitch” was just the result of one of the artists custom-naming a chord in a weird way (artists. ) If that’s the case, there’s no issue. Just need to be aware of it. I suppose it would be a small matter to make note of those and request little fixes for them.
I don’t know if “artist content” is relying on Scaler’s auto detection & naming features-- and the weird note spellings and chord names are just a product of wandering too far away from the key center (?) Or if the artists themselves are more “ear-based” and thus not bothered by weird spellings. As jamieh says, though, it’s not likely to cause problems. A person could go through some of that data and clean things up, at any point.