They have 11 generals, not 5. They arrive in 3 waves, first wave is 3 stacks, second wave is 4 stacks, third wave is 4 stacks, all led by generals. Then once they settle down, they follow the normal rules. If you see Kuo Kan, he's the last stack to enter in the final wave. It's there in the campaign_script.txt file if you're interested in looking, but it's spoilerish too so I won't list the specifics.