Ok..heres what happened. I started from scratch, got transport script working and began to place late activated aircraft for blufor, using script and trigger zone. It worked fine with this. I then added an opfor late activated aircraft using the same script and trigger zone(with different zone) and it no longer worked...its conflicting with opfor side aircraft. I take out the opfor aircraft and whala! it works again. i even tried just placing an opfor aircraft alone flying, with no waypoint and no late activated trigger and still the same issue. i tried changing radio freq, callsign, name..etc nothing worked..only by removing the opfor aircraft did it work.
This is happening with OPFOR AI controlled aircraft already spawned on the map. Next i will test client controlled opfor aircraft when spawned by other players with blufor and opfor players playing simultaneously.