My bathroom tub/shower is on the second floor of a high ranch. I had a small leak coming down near the tub drain. I could see this from under the tub. I had this problem about 4 years ago and replaced the stems, seats,with a replacement kit. Everything was good until this week. Started see a little leak again. I got a new kit and replaced all the same parts again. This time I still have a little drip. Also when i turn on the deveter handle to the shower I still get a little water from the tub filler going into the tub. If I have the hot water only on it is warm to the touch and if the cold is on it is cold to touch.I am a novice when it comes to plumbing problems.Any help will be appreciated.