Is the #2 plant growing slowly?

You're on track but like I stated in your other grow question, it's the moisture in your medium that's getting you imo. Good luck brother.

Normal, as others have said seeds are their own, its like siblings if you where the same as your sibling and not a twin it would be uncanny. Autos are also known for having weird siblings and doing whatever the fuck they want at times. I would not worry to much about it, maybe its vigour will pickup in flower. Good Luck!

Thats normal, height should be similar between 2nd/3rd. Second one germinated later so its like 1st one is day ahead. Just accept that are living organisms and got a slighly different energy potency in first steps of life. Gonna be okay. Bless

Hello my friend, she will still grow but you need to water further away from the plant. Let the roots search for the water in the soil and do not drown the roots by watering so close to this small plant. The roots need oxygen and they love to search for water at the outside of the pot. This way you develop a healthy rootsystem and a healthy plant above the grounf that will grow waaay faster!