I am also having this kind of problem. I've been following guides to a T and it always seems there is something I am not doing right. I did a good glass swap on a s4 and the touch isn't very responsive. It works for the most part, but instead of being able to press and hold apps in order to move them around, it just opens them.
I began thinking I needed to apply new adhesive to the body of the glass (where your finger would touch) and it looks so incredibly awful I'm to embarrassed to even list it for sale. Works perfectly, but looks terrible.
What am I doing wrong!!??