Good find, you just confirmed the INSANE CPU difficulty!
Check out my team's RPG, Legena : Union Tides
Have you seen the Red Sky? And the Green Lightning?
The person who was playing on that slot must have rage quit and the beta match got bugged, thus replacing him with a CPU on a difficulty...
If you think about it, it makes sense, I mean, no one wants to be stuck with a useless partner right?