AI "reaction" question

[dita]

Hope I understand this right. I`ve set a scenario up, the with a turn length of 20. I don`t want two 12.7mm HMG to move, wanting them stay put. So I set the reaction to turn 21, assuming they wont "react" and move.

Upon ending the scenario, and viewing the map, I see that the units have moved? Am I understanding the "reaction" button correctly?

I assume to get the same effect I could used the "D" key and say 0 movement?

Thanks for any help