What possible use is this for people such as myself who cannot access the page because we're not members? Would you kindly post it here, and we can go from there?
I still propose that someone fully dissassembles the relevant part of the ROM and ensures that all the checks and such are correct, and if not, we can then fix then and be sure of said things working. However, until someone does this, we could have missed any small check.
Maybe all you have done is put out fires, but the split Doesn't created actually implements the split without skipping vital checks, like type items or pinch abilities. The only thing it doesnt do is add the SDef boost for rock types during sandstorm.