I noticed that water was dripping out from the handle of the toilet in a bathroom in my house. I turned off the valve below the toilet and noticed that the ball in the tank was not floating properly because it had a hole in it near the base where it connects to the rod. This obviously caused the rod and ball to float high enough to stop the water from rising above maximum after the toilet was flushed. This resulted in the water dribbling out from the handle. I realize that I will need to replace the ball and rod contraption ( not sure what it is called). Even though I shut the valve off, I noticed that sometime, overnight, water still leaked from the handle. I would normally assume this was because I forgot to flush it or drain it a bit below the handle. Now the carpeted floor is soaked, and even some water dripped on the first floor from the ceiling below the bathroom. My real question is how come there was so much water even after I turned the valve off? I don't think that even after 9 hours, there should be that much water collected from a dripping toilet handle. By the way, the tank was still fairly full in the morning. Should I be worried that something else is leaking? By turning the valve off did I create some unknown back pressure?

The angle valve may be defective and is not shutting off water.

Shut water off at main .Open a faucet at the lowest point in house. This will drain water from rest of house.

Remove handle on valve. Remove packing nut that is located behind handle. Remove spindle and replace washer.

This should correct problem with valve.

Drain toilet tank and sponge remaining water so it is dry inside tank. On bottom of tank, remove feed line from tank.

Remove bolt holding ballcock and remove ballcock from tank.
Replace with a flowmaster filler.See picture on left. Follow directions on box for install and operation.

Chuck.

You have an additional problem. See the overflow pipe above the flapper, it should be lower than the handle hole in your tank. Water should never be able to rise as high as the handle, they are never water tight.