I see what you mean, but here's how it actually played out.
Turn 1 - he used Dervish on his first turn which let me Sukunda him twice.
Turn 2 - Dervish again, +1 sukunda and +2 tarukaja for me.
Turn 3 - More Dervish, I cast tarukaja 2 more times and still didn't get "limit reached message"
Turn 4 - Dervish, +1 sukunda and normal attacks.
Turn 5 - Dekunda + normal attack from him, etc.
So i'm quite confused why the 3rd time I cast sukunda or tarukaja they still worked, and why he didn't bother doing anything.