I don't have the manual in front of me, but I do believe that, at least in the Ford manual, the adjustment figures are only for use while the pressure plate is in the specified jig. Along with the jig, specific thickness spacers had to be placed between the plates while making all of the adjustments. I assume that this was to compensate for any disc wear should the clutch be adjusted with a used PTO disc inside.
Assuming you made the adjustment while on the flywheel without the factory jig, I think this is what happened. I've rebuilt dozens of those pressure plates many years ago, and never had anything like that happen to me. Of course, I always had a jig at my disposal as well.