Non-standart order - when starting offsets are positioned differently from what is considered 'normal', e.g. effects going before headers in SPL/ITM.
The problem about ADD_CRE_ macro was it's inability to handle properly NSO files, since it was assuming they were SO and didn't bother to check if other offsets were in need of shifting.
As a solution, ADD_CRE began checking for all other offsets, thus allowing for NSO. A slight drawback of it was the possibility of it itself creating NSO from SO, under certain conditions.
Since then, apparently it's been decided somewhere to use a full validity/reindex check before doing the specified patch. Therefore, the offset-checking became obsolete and no longer required to support NSO, but it didn't cease creating NSO on it's own.
PS I suppose some live testing wouldn't hurt then, to be sure.
PPS Curse it, I'll test atm.