As you are probably aware, the latest patch (3/26) has caused a lot of problems with CC. Since this patch came out, any CAS item that uses the high bit on group and instance, as EA requested that tool-makers number CC items, fails to get appropriately sorted by category. Instead the item is present in every category even if that category is not normally present for the gender of the Sim it is being used on. So, for example, adding a male t-shirt recolor to an otherwise empty mods folder, categorizes it in ALL upper body groups. It even goes as far as adding bra category to men's tops just to display a CC t-shirt.
It came as no surprise that the CAS Part Resource changed, as it often does with patches, but breaking the high bit on the group and instance number that we have been told to use from the beginning has created quite a problem. There is now over 6 months of CAS custom content made by our community that has worked until now. Creators have trusted the tools they use to make CC as the tool creators have trusted the SimGurus when they told us to number things this way. All tool creators followed your direction on this and, as a result, all CAS custom content is now broken.
S4S has updated to accommodate the CAS Part resource changes and for now has dropped the high bit on group/instance. As a result of abandoning the special group and instance numbers you assigned to modders, new CC now sorts properly. This, however, does not fix the problem presented by the thousands of CAS items made over the last 6+ months. If we make a batch fix to strip off the high bits from the instances, all that CC will have a new identity and any Sims that use CAS CC will need to be remade. Games will be full of bald Sims with the wrong clothes on. Further, this will create a second problem because there will now be two versions of CAS items, the one which was "fixed" and the one that was not. This will lead to confusion when players try to share saved Sims.
The only reason CAS CC items aren't working properly now is because we were instructed to number them this way by the SimGurus and we trusted you to make sure using this numbering system wouldn't target our content for failure in a patch. Please do the right thing and fix this. If you do not plan to fix this at least let us know as soon as possible so that modders can set about repairing the mess resulting from this patch.