I actually have three questions if that's okay. First, this photo shows my Mother of Thousands in a 4" plastic pot, with the bottom two leaves that are tearing, like they are being cut off, and they are turning yellow. I don't know why.

Second, This is my other Mother of Thousands that has two roots shooting out of the stalk about 2" above the soil, and I have this one planted in a glass dish with no drainage holes.
Is there a reason that the leaves of the first plant are tearing and turning yellow? What should I do about the roots on the second plant, should I put the plant deeper into the soil? Is it okay that I have it in a glass dish with no drainage holes?
I am very new to the world of Succulents and have very fast become addicted, but I don't want to harm any of my plants, and the Mother of Thousands are one of my favorites.
I live in North Florida, it was 80 degrees today, but I keep them inside. I keep plenty of light on them during the day and florescent light all night long. I only water them once a week, but I am getting conflicting stories to either water the soil, or spray the leaves. I tried to find help online, but was unsuccessful.
Please help, if you can.
Gratefully,
Just Learning