shinobi

I've been playing the game so far up to the training simulator and have Ai on my team. My characters are up to lv7 each, yet I cant figure out how to equip their forward skills!! Ive unlocked some of their backyard skills and somehow those show up just fine but I cant get my main forward skills to show!! Like for example with Ayumu I unlocked and leveled up his Ayumu Volcano skill to lv 2 but I cant equip it. Please someone help I dont get why my backyard skills unlock but not my forward skills.