I will suggest getting new pots, new soil (home made or store bought) that is for MJ and start over.
As said autos do not reveg ever, what is the temps? IF this was supposed to be an auto, go get a replacement from the vendor.
It could be poor genetics, with the one. The other is almost done and will not make much.
We need much more info on your setup. PH, RH, Temps, soil, feed, lights (actual wattage) and type, schedules and so on. Every detail.