DJ Sona "tracks" Have Duplicates In Each Song

If you visit DJ Sona's promotional page and preview her abilities and what they sound like on the Kinetic song, you'll notice if you flip between the two abilities, both E and R are the same track.

This is also true with Concussive's Q and W tracks. Ethereal seems to be unique in no repeat tracks in this regard. Why are Kinetic's E-R and Concussive's Q-W duplicates of one another? Is this something that will be refined in the future or are these the final representations of these abilities, seeing as the artists are done producing the songs (The Crystal Method/Dada Life and Bassnectar/Renholdër)?