Ambush wrong?

May 10 of YR7 Empyrean Scorpius (5:14) invaded Wide Wide World of Sports (3:3) and captured 151 acres of land.
May 10 of YR7 Wide Wide World of Sports (3:3) recaptured 37 acres of land from Empyrean Scorpius (5:14).

Why did I only get back 37 acres when I should have got back 75?

Scorpius is an avian. They lose only 25% of the land to ambushes.

�� Sneaky Avians

Thanks... I was schooled on that