GreenJeans:
I've been using the stuff exclusively for years and have never run into this issue. In fact, my feathers invariably outlast my arrows (which is an indirect way of saying that I'm not known for my shooting prowess). Here's what I do to apply EACH feather.
1. (Ensure that the shaft is clean. I use acetone for this purpose)
2. When applying the feather to the shaft, apply VERY firm downward pressure on the clamp to facilitate the best adhesion your jig/clamp rig is capable of.
3. BEFORE removing the clamp from the feather, use a THIN, small flat-head screw driver (I use the small screw driver on a Leatherman tool for this purpose because it has a thin beveled edge) to reach UNDER the clamp and then press STRAGHT DOWN on the feather quill at several places along the length of the quill. Ideally, I'll try to press down on the quill at each end and once or twice toward the middle of the quill.
4. To avoid knocking the quill loose before I have a chance to do step #5 (see below), I open the clamp FULLY when removing it from the feather. Most experienced arrow builders have learned to do this out of habit, but I am unsure as to yours or others' level of experience so I have included this step.
Now, the most important step:
5. Hold the arrow by the shaft close to feather and using your thumb nail, run your nail down the entire length of the quill about half a dozen times. Be sure to press straight DOWN on the quill so as to avoid the quill sliding sideways and inadvertently adding/removing any amount of helical twist to the feather.
6. (Optional) To help ensure that the quill moves freely past your shelf material, use an Exacto-knife to taper the leading edge of the quill so that it is not unnecessarily long or sharp.
7. Apply a drop of fletch-tite glue to both ends of the quill.
I have found that by incorporating step #3 and step #5 into my fletching process, and by using Bohning (or any other quality) fletch tape, I am able to achieve a perfect, permanent bond between feather and shaft. With practice, these few extra steps will, in total, add less than an extra minute or so of fletching time to each arrow. Sorry for being so wordy in my description, but I have tried to explain this process such that someone with no fletching experience could follow along.
Good luck,
Labs