Chloramine does dissipate. It just takes a lot longer than regular chlorine. If you stopped putting any water derived from your tap it has cleared.
Who knows. The possibilities are endless.
I have no idea,
Boom, your tank is cycleing.
Further aquarium knowledge, The API Nitrate test is sensitive to nitrites. It is totally inaccurate until the nitrites show zero or very close to it.
it will happen soon.