Side 3 of the wide screen editions of TMP and TVH were CAV despite the labels saying "CLV." Side 2 of Generations (with the crash) was in CAV.
If I'm not mistaken, the standard release of Voyage Home had side 3 in CAV (improperly labeled, as you note), but the "Director's Series" edition was all CLV in order to add a Leonard Nimoy interview - which was frustratingly placed at the beginning of Side 1 before the movie, even though the disc had NO CHAPTER STOPS! The only way to start the movie was to either watch that damned featurette or fast-forward through it every time. And if your player didn't have Digital Field Memory, you'd have to blindly fast-forward with no image on screen and hope you stopped at the right place.
I went out of my way to buy the standard edition for that reason. The video transfer was otherwise identical between the two discs.