Great point on the forms Teresa, too heavy and they will pull. Per the fitter at SOMA, if your adjusters are twisting your straps aren't tight enough allowing some play and movement. You don't want them cutting you in half, but they need to be secure. If you've never had a fitting done, go, and if its been more than a year since you have been fitted, go again. Not only do the bras wear out and stretch from wearing and washing, we change as well. I get fitted / checked every 6 or 7 months.
Sorry if I derailed your thread