I'm trying to figure out what you're saying. I think you're saying that you COULD get a solid anchor and a good release with a glove, but not with a tab. If that is the case, then I would guess that the thickness of the glove over your fingertips allowed you to feel like you were getting a solid anchor with a glove, even though your fingertips were not really touching the corner of your mouth. With a tab, where you actually have to touch your fingertips to the corner of your mouth, it doesn't work. These are the alternatives I see:
1. Stay with a glove. Rick Welch, my mentor, has always used a glove and few people can outshoot him. I'm sure he wonders why I switched to a tab (but probably doesn't lose much sleep over it).
2. Just keep shooting with a tab with the same anchors you've always used, and you'll probably get used to it.
3. Pick a new anchor, like the cock feather on your nose and your thumb on your ear lobe, that might work better than the anchor you've always used.
4. There's nothing wrong with a floating anchor if it works for you. I sort of use one myself.
Note that all of the 4 alternatives are wins. Not very often in life that you can roll the dice and be sure of coming up a winner.