If you mean the offspring will vary -- yes. You will get both in the seeds that are produced. From what i understand, to get 100% autoflower seeds, or nearly 100%, it takes more than one generation of breeding, but i could be wrong on that. Genetics is just a lesson in probabiity... the math is incontravertible. The ratios will play out with a large enough sample. it might be 95.7%, it might be 93.2% or it might be 100%, but it isn't unpredictable or random except in a small sample.
if it flowered without along night, it is an autoflower... you merely bred one with a longer than usual vegetative phase. That could be a very useful trait, actually.
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If you mean hyrbirdiztion within one specific plant: somehow one plant exhibiting both traits of autoflower and photoperiod.... highly unlikely and the only outcome is a plant nobody would want to grow.
so, if it flowers with greater than 10 hours of darkness per day (this varies), it is a photoperiod. There's no hybrid here because you can't give it more light per day without causing a re-vege.
if it can flower without a long dark period it's an autoflower... the only thing here that might be caused by incongruent flowering genes is a mutant that exhibits vegetative growth (aka stem elongation and leaf growth) long after flower initiates, which would not be a trait anybody wants. The 'hybrid' trait would be an autoflower that is also sensitive to light cycles, lol... that's just not useful to anyone.
i wouldn't assume oddities of autoflowers is guaranteed to be a matter of genes related to photoperioism. This trait of late flower stem elongation can be seen in strains like dr. grinspoon and no ruderalis genes were involved. Similar traits can be caused by independently evolved genes, too, so it doesn't preclude the possibility, either.
The point is.. any hybridization of the trigger for flower in one plant would lead to a fucked up plant.