I too tend to be a bit ( ok more than a bit ) AR. I'm assuming that by stacking you mean packing the clumps of spun hair together rather than stacking it even prior to spinning. If the stacking/packing is a problem it may be that you're spinning too tight. Spin just tight enough to hold it snug then pinch it between your thumb, index and middle finger and push hard. If you slip on occasion and drive the point into your finger that's about the right pressure, I swear

. The trick is to stop just before the slip. There are also delrin tools just for this. I've never tried them though. I find the promise of a hook point just the motivation I need to time it right.
don't give up, it will pan out.