Match endpoints does not solve the problem. I am using clothes that worked perfectly before. I wonder if this problem started with one of the recent Poser service packs?

I took Apollo into the setup room to look at his bones, I noticed that even in the zero pose, the collar bone is out of position. Something wrong with the rig.

I found a workaround of sorts. I used figure - symmetry left to right and copied the joint zone also, and now shirts conform properly. You have to do this before conforming the clothes. I never had this issue before.

The shoes are still a mess though. I think the rig is damaged in the feet as well, but I don't know enough about rigging to see what is wrong for myself. I don't think I have the skill to fix the feet.

Here is a screen capture from the setup room showing the difference between the left and right side in the bones. That accounts for the distortion on garments that cover the upper body.

 

Poser 11 Pro, Windows 10

Auxiliary Apps: Blender 2.79, Vue Complete 2016, Genetica 4 Pro, Gliftex 11 Pro, CorelDraw Suite X6, Comic Life 2, Project Dogwaffle Howler 8, Stitch Witch