Thank you!
Of course, the one time I decide to double the faces and invert them instead of pull them into the middle, I forget to do them on one mesh XD Changed it!
I think the female shorts should be fine, I checked on the other shirts and they fit perfectly, it just seems to be with the jumpers as they stretch over the seam line.
Here’s it working with other items:
Out of the 27 default theres 10 having a clipping issue.
From what I can see it might be an issue with the default wearables and not the shorts when it comes to clipping on the sides (example of default with default):