that plant was a hermie.
i had the same issues with 2 plants and didnt catch it in time.....
chances are since that pollen pod looked open, that the pollen has already circulated in your grow room, especially if you have fans..
all you can do is hope that the females didnt get pollinated and that they wont form seeds.
good news is that if they do, the seeds will be 80%-100% feminized.
bad news is that you dank nugs might have some seeds.
as per the temp recordings, what i did was to make sure that the thermometer.hydrometer was at the same level of the main colas to get a pretty accurate reading of the ambient temps and humididty of the area where most action is happening.
my particular therm. has a high low save feature. i check it during lights "on" and clear the previous days high/low, and log it every day.
im pretty sure that i have light leaks and i know that my temps fluctuate from 55* during lights out and 85* during lights on, so i attrubute that to my 2 hermies. cant figure out why the 2 that did the best turned hermie and the others didnt but........what ever.
as per seperating them, i just left them and i pull pollen pods everyday untill harvest now. i found them too late and im not interested in losing 2 very nice plants, ill just hash them.