Yeah, that air stone is super important.
I didn't know these were Auto's. They definitely don't look ready to flower. There is a chance these seeds didn't pick up much of the Auto sexing traits from the auto parent. If you switch to 12/12 lighting that will probably move things along in the direction you're hoping for.
I find Auto's to be a fad. Like pogs, or the tomagachi, or pet rocks. You can grow better bud with Sativa/Indica and it only takes a few more days. With the combination of 12/12 from clone, there really is no need for Auto-Flowering plants other than to fulfill the demand by growers. I mean, you have to order seeds every time you want to grow it. Lame.
The temperature is an issue. Increasing the ventilation is the only answer aside from adding air conditioning to decrease the room temperature. I run a 5,000 BTU conditioner I got for $100 and it keeps both my humidity and temperature in line. The difference in quality is worth the $100 every time. Your humidity sounds alright though, and honestly, 80 to 85 isn't terrible, it isn't 90, but if you can get sub-80 you're going to see a noticible difference.