Its fully understandable for the AI to enter a combat reaction when an AT mine goes off, but for it count as detection of an enemy force seems too much.
EG; In one mission I am trying to create, if Opfor spot Green-Army units they will call in some pretty heavy helicopter support. However the mission is centered around a convoy ambush and so weapons like AT mines are vital to the teams success.
Also seems to include "knowsabout" condition.