Illegal attack - libero set

[genetoy71]

NFHS, Ohio situation. In a high school match last night, I had an illegal attack call due to a libero setting in front of the 10' line for an attack that was completed above the height of the net. It wasn't a typical 2-handed set but rather a defensive action that resulted from a hard-driven ball being directed toward the libero's face. She instinctively threw up her hand in front of her face but not above her head. The ball went off her one hand, up in the air and the left side hitter killed it. Of course, one coach agreed with the illegal attack call and other argued that she was just defending herself.

NFHS rule book references "overhead" finger action and the case book references "overhand" finger action as not being legal by the libero on or in front of the 10' line for attacks that are completed above the height of the net. Has anyone else 1) ever had an illegal attack call for a setter that was one-handed and defensive in nature as opposed to offensive, and 2) had any situations where finger action was overhanded (as differentiated from underhanded) but not overhead?