Continuing the discussion from the "Current small issues" topic:
I also noted some of soundtrack issues similar to those illustrated in the "Current small issues" thread (figured I give the thread a more descriptive name so I'd be easier to see/find)
Cotton Alley - Dark World Levels
When playing with the 2015 soundtrack, the Cotton Alley Dark levels are playing "Cotton Candy" (light world music) instead of "Bandage Girl Boogie" (proper dark world music)
Super Meat World - Intro Cut-Scene
Also while playing with the 2015 soundtrack, I noticed that the cut-scene that plays when entering Super Meat World, is using the 2010 soundtrack. I'm not sure if the PS4 had an "equivalent" cut scene music, perhaps teh internets (if that even existed in the PS4 version), that could/should be used here. Perhaps nothing was recorded for this at all. ¯_(ツ)_/¯
I haven't had a chance to look at some of the other mentioned tracks mentioned in the "Current small issues" thread. Feel free to merge this in / update the name of the topic.