Why do the tips turn Yellow?
Why did my plant only produce one planet?
What size pot do they need?
How much light?
How much Water?

Yellow tips can be from improper watering or using hard that contains Fluoride and Chlorine and other mineral's. Try using distilled or rain water if you have hard water.
Let the plant get a little rootbound and give it a little more light. Give it time, you will see more babies.
The plant should be in a pot one inch bigger around than the rootball.
They do well in bright indirect light, a little sun during the day is fine, just not full on hot sun. They also do very well outdoors in the warmer months in the same light conditions.
Water thoroughly and drain out tray. Let the soil dry out between waterings. Very easy plant...