As the thread title shows, when I want to teach my DC a special ability, 'Aerial Defender' is not an option.

Similarly for my AMC. I want to teach my AMC, 'Shadow Striker', but the option is not there.

The abilities they could learn are something like, "Corner specialist" or "Free-kick specialist" or "Penalty Specialist"

Does this mean my players cannot learn the special abilities I want to teach them?