D3 is not a multivitamin. You should have three types powders, calcium with/without d3 and then a multivitamin to add vitamins to your chameleons diet.
Looks good so far, and I know, they are so great! Are you going to add another plant too? I think a small ficus or schefflera would help. Otherwise you'll have some spoiled pygs:)
Also for the calendar, of you have any apple device, put it in he calendar there and it will go to your other devices through iCloud and you can turn on reminders.
How big is the small enclosure? Some juvi chase can last a cham for six months. Welcome to the forums too! You'll find a lot of info at this friendly community:)
Could of been a mutation or something strange inside the dame. I'm assuming they should be fertile due to the vermiticulite. You didn't inbreed, right? That could be a possible cause. More experienced breeders will chime in but do you think it would be humane to let it hatch?