The reason why this is 5 and 6 is because it's roughly the same concept, but one story involves The Evo group mentioned in prompt 4 and the other is about the hermits. 

 I actually have some drawings featured on my DeviantArt (just the genderbent hermits though, but I'll be submitting the genderbent Evolutionists soon). 

 Prompt 5: 

 X and Biffa have noticed something wrong with the code causing the sky to gain a weird blue and pink mist in the air. This mist does nothing at first, but when everyone wakes up the next morning they all find themselves as the opposite gender.

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(This story may end up being the sequel to Prompt 5)

Prompt 6: 

 The Evo group (Mini, Zee, Martyn, Netty, and Timmy) have noticed a weird mist in the air. They shake it off at first because of how cool it is, but they discover that there are weird breaks in the sky causing said mist to leak in. They had all breathed in the mist, and when they wake up again they all are the opposite gender too.