JeffinCanada, Be Patient Man, your Girls look good. Don't pay much attention to the Breeders time frame recommendations. I feel like 65 or 70 days is usually for ideal, perfect conditions and environment. Seldom found by most of us .Auto’s Typically take at least 90 days for me. give or take a week. Depends on the strain, weather conditions…..etc..
I have experienced something similar in the past, and chalked It Up to unstable temperatures. In the winter sometimes I find it very hard to keep a consistent temperature, during the Dark Hours especially. Usually end up overthinking, over correcting light distance & nutes For an unconfirmed problem. Not helping actually making it worse in the long run.
The pictures look good, be patient, They will let you know if they need something extra.
I had a few plants with a similar problem. finally ended up just flushing them really good with plain water to make up for all the unneeded corrections I had tried. That seemed to help more than anything else to get them back healthy looking. I will look again, but from your pictures they look fine, Leaves start turning yellow towards the end.. You’ll know when they're ready for Harvest. Those last few weeks they can really kick ass, fatten up surprisingly quick. Plant some new ones to have ready & take their place, At Harvest. Just my opinion. Happy growing.