Zeranthes

The mod is working correctly, you are just going beyond the collision that the mod supports for that body type. For example you install the mod to apply collision to the curvy default build, well if you change your body type to be beyond that, it is going to begin clipping. It is still applying the physics as if your body fits the installed parameters. TL;DR just pick a more endowed body type during the install process and it'll start looking better.

Are you assuming mods on SE will just automatically work on OldRim? If so that is a definite no due to the difference in code the versions of the game run on.

The right arm, when you wear any armor that goes on that slot it just looks like your arm is swollen. Does anyone know of a fix for this? This mod has screenshots that illustrate the problem pretty good: https://www.nexusmods.com/fallout4/mods/26428