Should startup torque be higher in value than full load torque in an induction motor?
If 25.68Nm is your full-load torque, 38.53Nm (150%) as startup torque makes perfect sense for a Design A or Design B squirrel cage induction motor.

But a max or breakdown torque of 322.4Nm (1255%) is much too high, which should max out in the 200% to 250% range.  

The torque the motor supplies depends upon the load.  You'd have to compare your numbers to nameplate data to determine full-load torque.

$$T = \frac {9.55 P_m} {n}$$ 

Where T = Torque, \$P_m\$ = mechanical power out and n = speed in rpm.