I am not saying Cueto is throwing a fit, but considering how Homer was handled last year, he may feel he deserves to be in AA and has lost focus pitching in high A. Lets take this example: Johnny goes to AAA, a level he probably isn't ready for, holds his own and goes back to high A and throws a gem. My guess is, he expects to be promoted, but it doesn't happen and he loses focus then gets beat around his next start and his k's drop again.
I don't see that as a crazy possiblity, nor is it a fact. Just a possiblity.