the purple looks like possibly suntan. most superhots have purple in the stems and will get a purpleish suntan where it's not protected from the sun by the leaves
then again you could have a cross. i'd have to see closer probably to tell you with any certainty. all 3 pics look like the same...
just don't call them "carolina reaper" and you will be fine. what a bunch of bullshit. glad i didn't give my money to them and have no interest in paying a dollar a seed for an unstable, accidental cross that somebody's trying to get rich from.
i would chop it in half and let it sit to dry if you don't have a dehydrator. i always chop them in half, otherwise i get a greyish white powdery mold inside.
i've had yellow habanero seeds that ended up orange but they had no heat either. cut back on the water and pick them after the soil has been dry for a few days and i bet they will be hotter.