"School of Piranha" doing level 1 dmg at level 3

[Dragondevo]

Randomly "School of Piranha" spell is doing the dmg to the enemies as if I was using lvl 1. It is still taking the 25 mana when it casts it. Before I cast it and seleting where to cast it, it shows the dmg for level 3 but that isn't the dmg it ends up doing. Originally it started very rarely but the farther I progress the more frequent it is becoming. Reloading and recasting the spell usually fixes it. Has this been a problem for anybody else? Is there anyway to make it work?