Is there a reason why Jade's theme; Sunslammer and Sollux's theme; The La2t Frontiier have the same leitmotifs?

That’s. You know I never realized, and it’s not just the Leimotif, right before the part with the same Leimotif it uses instrumentation commonly associated with Bec and Jade.

My theory? It’s not Jade and Bec’s Theme. It’s the Green Sun’s Theme. “Last Frontier”, Sollux theme, I don’t know when the song was made so this assumption may be entirely wrong, but Sollux WAS the one who brought the Meteor to the Green Sun. “Sunslammer” and the fact it plays when the Uranium Imps are messing around with Green Sun powers reinforces that this was, in fact, the composer’s way of evoking the image of the Green Sun. “Last Frontier”, too, implies breaching a last barrier that seemed impossible- Bringing the Meteor to the Green Sun- And also, a sense of Finality- His body dying through burning out his Psiioniics.