Just wanted to throw out, I think some of this is in place. Wolf-type enemies that attack in packs like in guildleves tend to have any that you aren't focused on try to circle around you, or at least it seems that way >.> Correct me if I'm wrong...

Cactuars also move around like little jackasses so you have trouble staying in range/facing them.

Either way it means that there's potential for this kind of enemy behavior.