I had my engine rebuilt through Napa. We put it back in. It leaks oil "badly"

It leaks oil from the front covers. Right between water pump and somewhere around oil pump. Hard to really tell where it's directly coming from. We have tied resealing it 3 times. Finally took it to a reputable auto shop that we have done business for years. They rebuild and do right down to minor repairs. We had them take it apart and reinstall. Leaks almost a steady thin stream now. Just don't get it, completely bewildered.