I did initially assume those were abstracted/player-convenient/cost-convenient choices, but was confused why said convenience didn't extend to the dance/barn scenes, hence my first comment. I think the best compromise would be to have Helen explain it (and how to see them) in an interrupt-cutscene the first time you get a character to level 300 (or whenever their pole-dance scenes unlock); that way, not only is their place in the timeline explicit, but it also rectifies an earlier issue I brought up about how those cutscenes are too well hidden to begin with.
By the way, is the rain in Raine's 4th CG also an art convenience and she just thinks it's raining sometimes? My main question about that was the weather being the same, after all. And how does Susan's uniform get unburned? If she just straight-up has a second set, maybe you could add it to the background of her 2nd CG as an Easter egg.