I'm not sure how much of that we can take as fact. Rock is definitely hiding things, so to me, he's our most unreliable narrator (outside of the Interlude characters). We know what he's told Kaladin and the Bridge 4 crew, but there's really nothing to back it up at this point.
Moelach is confirmed to be up in the Peaks, right? I think it's not a likely anymore, but confirmed by Mr. T.