There seems to be some kind of caching of where the reset location is for vertices.  Take this shirt for example. I did the same thing on both of these items. I placed the character in a A Pose Open pose. Reset the items to an assessory and reset to its original shape.I then did the normal weight to the clothing object and entered skin weight mode> Selection> change to T pose. Both sides of the mesh looked like the left side. Similar weighting issue.. easy fix. I then started to select the spine02 and selected half of the top and did a 100% replace on the verts. In CC3 the expected outcome happened and the mesh took a proper 100% hold on to the top. Where in CC4 the verts seem to shift towards their original location but are suck in a weird positional shift. This happens with most of the clothing I have tried doing weight painting on in CC4. Is there a thing I am missing? Or is this a known issue?