Weird mesh issue with a Sims chest

Thought the game was blocking me from changing the volume of a Sims breasts unilaterally, it would seem what's happening is random Vanilla shirts and dresses are glitched in someway.
When I switch to an unaffected clothing item it lets me change the size of the chest just fine, but when I switch back to the affected clothes it continues to show a random chest shape my Sim does not have. These are not sculpted clothing items like a corset or shoes or such that would warp a sims frame, a menswear suit is should medium sized breast no matter how full or flat I make the chest.

These are vanilla clothing pieces, I don't have ANY cas cc, emptying my mod folder doesn't fix the issue, and the only mod that has anything to do with cas is the more columns mod.

Everything that comes up is very old and/or is explicitly about broken slider and cc mods, which I don't have to be broken

ive tried a lot of random solutions, using mcc to change the breast values, using trait.equip to remove the breasts but they dont come back with the cheat or by fiddling with cas settings so thats a nonstarter, reseting the sim, tried erasing cache(maybe did it wrong!), removing mods