In all my time growing auto's (4yrs... ha) I've never had to jump start one yet... I've had photo auto crosses where half turned auto and the other half photo but I was fully aware of the cross and was expecting them to go one way or another.
You may find you have something similar but the auto gene is strong enough that the flowering continues at 18 / 6 once you have jumped stared them but you should never have to do that if the breeder is doing there job... may ask which breeders you have used for this to happen?
I would be getting on to that breeder / breeders and leaving a review to warn people of what has happened... If you have a full journal on the seeds we at AFN we would love a review on the company / strain then others will be warned if they wish to spend there money