Question about CO2 and what it can change on a plant....

So i have this wicked white widow plant! Has always been hard as a rock. White as shit and has this wonderful unmistakable smell. It always finished in about 60 days. Could pull as early as 55 really. So now I have CO2 at 1250 ppm. The Buds are freaking HUGE!!! But it looks, smells nothing like my old plants. Which was fine. But i am pushing 60 days and its not looking like its wanting to finishing the final stage of budding. I just figured it was taking longer cause the buds are so big. But they have been big for a long time!! Just different. Waiting to see what happens.... Anyone have issues like this before????
Thanks
 
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