Hey by what you are saying, seems like those plants reverted back to veg... new growth and deformed leaves etc are a sign... just surprised that it happened so quickly! if i were you i would leave them on the flowering schedule since you are already so late in flowering... might affect your end result but... you live and you learn!!!

good luck

edit: sorry i misread (kinda stoned), thought you said you left the lights on for 2 days!! which would explain this.. however having them off should do this.. thats weird, sorry cant help on this one!