I foset in my shower leaks into my tub constantly, even though it is turned up for a shower and not a tub. When all the water is turned off it leaks cold water, when the shower is turned on it leaks hot water and when the bath is turned on it leaks hot water as well. We have tightened all of the handle screws and replaced them all well. What is going on and how do we fix it?

Please Tell us the brand and the model number of your Tub/Shower faucet, Thanks.

John