The tell should actually exit from the slit in the center of the patch to make it work better - but that is minor.
Chris was right, and you got it on the second try, Yakaholic. I think it would not only work better if installed properly, but would also stay attached longer.
I meant that I used the slit "backwards" from how it was intended. Look close. I put the tip of the telltale back out through the slit. It would have been better not to do that.
I put them on my jib wrong too.
Oh well, at least I figured out what I was doing before I put them on my wife's sail.