Hi Phil,
I played this one long ago I believe. I also just looked at both files in the editor (Craig Foster's and Rod Coles). The 125 PG Regiment has a release time on Turn 14 but unfortunately it is only 5%. That's pretty low! Statistically that implies you could go about 20 turns or even longer before they get released. Could have just been bad luck they didn't released.
BTW I played as the British and lost. The 125th PG Regiment did release around Turn 30 something and wiped out my Paratroops...LOL!!
The two "??" are due to Extreme Fog of War being turned on. With that all your reinforcements and releases are marked with those "??" so you don't know what to expect.
The issue that puzzles me after reading your scenario report is you indicated that Yossarian fired on some of your fixed troops throughout game play. Incoming enemy fire should have released them automatically in the target hex. But the hexes that were not fired on, should still be fixed and governed by the 5% release criteria is my understanding about game play.
To me it sounds like bad luck that the 125th PG didn't get released.
Regards,
John