You are correct, the SSR in scenario one is not the proper text. I was a little confused myself when I looked at it as that's not how I recalled them, although it's been a while since I worked on this project and I'm honestly having to double check myself currently with pain meds still doing their job.
So, I dug through my old notes to look at my original rules draft submission and am including the correct text of the SSR for scenario One. I apologize for the confusion and have sent it in to be updated in the manual going forward. Good catch, you get a cookie!
Scenario Special Rules:
1. Until activated neither the 334/32 or 7/66 NVA battalions may move or fire normally. The 334/32 Battalion may however, fire on adjacent units. If the Roll for Event number rolled at the beginning of the American turn (to determine if there is an event) is equal to or less than the turn number doubled, the 334/32 NVA Battalion is activated and may move and fire normally.
Example: if the American rolls a “2” on the first turn, there is no event and the 334/32 is activated. If the roll was a “3” on the first turn, there is an event, but the 334/32 would not be activated.
2. The 7/66 NVA battalion enters play
two turns after the 334/32 Battalion is activated.