What seeds are you currently running?
I'm running Sweet Seeds BlowMind ... although they're absolutely reputable and have never experienced nor seen a sweet seeds not auto ... it's a complete freak.
But i agree with being careful with some of the raft of new comers on the scene - There's a rush to get in on the autoflower action and perhaps they don't have the quality controls and testing in place that the larger established breeders have!