The only way that would happen is if something was overwriting all the .DVV files, and the main suspect for that is CFG loader passing the wrong location of the memcard.bin file. Since you mentioned several times that you use CFG, that's likely what your issue was...If we lived in the perfect world where every user had the same game compatibility then I would be using devo instead of Nintendont (I never posted my problem in this thread so i'l post it now. ALL Games loose verification after you boot a few games on Wii U.)