AGL altitude check bugged?

[Mud]

I made a trigger to fire after a unit's altitude is lower than 800 AGL, but it already fires at 2000 radar altitude.

 

This is in the Persian Gulf map, above the water and near the carrier.

 

In the missing editor the water is seen as 0 altitude. So I have no idea why the "unit below 800 AGL" already triggers at around 2000 AGL.

[Mud]

I just realized that the mission editor uses meters rather than feet. There's my problem most likely :D