Thanks for the replies everyone. For my next attempt I am definitely building a better fruiting chamber, and also getting an analog hygrometer (the digital ones are supposedly inaccurate) to keep a close eye on the RH. It's pretty much guesswork for me right now, I just try to keep the temperatures high and keep an eye on the condensation on the sdes.

I picked the single full-grown mushroom, it's drying right now. I'm going to take the advice and stop misting for a while and start fanning more. I have placed the kit closer to the radiator in the room. I'll just keep the kit going for a while longer and we'll see what happens. If things start looking bad I will just harvest all the pins, clean out the bag, dunk  the mycelium and wait for hopefully a better second flush (if anything at all). Still crossing my fingers that just maybe a few of these will still mature though.

So far I've learned a lot though, I'm sure my next grow I will do things differently, and things will go much better.