As suggested above, I went into a CR2 in which the superconforming was broken, and replaced all the 1's after the Figures and body parts with nothing. It is not that tedious with search-replace.

It did not restore the superconforming.

Then I looked in a CR2 in which the SC works fine. All the Figures and body parts have a 1 after them. 

Clearly this number thing is not the issue in all items of clothing, though it may be for some. Something else breaks the SC upon being saved back to the library and I sure would like to know what, and how to fix it.