Black tape or white tape? White tape is rough is meant for gripping whereas black tape is smooth and is meant for getting a snug fit. Where are you putting the tape? In front of your thumb or behind your thumb? Tape should be placed behind the thumb to keep your thumb from coming loose during delivery. So that you can keep your thumb and your hand relaxed during your approach. Perhaps one piece of tape in front of your thumb to help with the grip. Too much tape in front of your thumb will lengthen your span and lead to squeezing the ball. It almost sounds like you are putting black tape in front of your thumb and squeezing the heck out of the ball so that it comes loose after a game or two. How snug is your fit? Do you have trouble getting the thumb out and do you hear a popping noise when you release the ball? The fit should be snug enough to keep the ball on your hand but no snugger. Your thumb is supposed to come out easily during your release. Have you cleaned out the thumbhole so that new tape adheres without slipping? The Pro Shop
sells pads for removing old tape residue from your thumbhole. Alcohol and cloth will also work.
Why don't you talk with your Pro Shop
about your problem and the proper way to add and remove tape. A live demo is often best.