decrease atk??

I just want to ask why is my normal atk damage to monsters relatively lower than what is shown in my stat page?

 

ie. ATK:88k

     normal damage 49k

 

at first i thought maybe because Im challenging high leveled monsters thats why its reduced but when I try it to normal stage 1-1 same thing happen?.. 

 

Is this a bug? or is there something I dont understand with status atk - normal monster damage relation..?

Your ATK stat also takes into account your attack speed bonus and your critical hit damage and rate.