I'm seeing the same thing, I think. No matter what I do, I can't get the rs1compatibility songs to show up in-game. I've deleted the files and had CFSM rebuild the rs1compatibilitydisc_p.psarc and rs1compatibilitydlc_p.psarc files from scratch and still not showing up in the game.
I'm considering nuking and rebuilding Rocksmith from the ground up. Anyone suggest if that's the best option?