I thought I wasnt the only one that was put off by the weird Sountrack choices. I just play the decompilation of Sonic CD and leave it be. I thought I was going crazy when the CPZ2 Shortcut didnt have the top loop thing that sent you back if you went to fast on the Retro Engine port. It seems that was changed, but I did not even know they added some extra stuff to CPZ2! I did discover the new Tails route for HTZ1 which was pretty neat when playing story mode and messing around with tails carrying me over.