Parallel Processing, License Time

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Hey, I just ran a script which ran 4 fault studies in parallel using a version 32 timed license, it took about 4 minutes(total) to finish them however when each finished they added 4 minutes to the license used time. Is this simply how it is designed? Or should i be running it differently so that this does not happen? (Code used from answer to question 'PSSE dynamic simulation on multiple processor cores') Below is code from output in python when finishing.

Time Used: You have used 0 hrs, 40 min out of an allotment of 200 hrs.
Program has STOPPED.
Time Used: You have used 0 hrs, 44 min out of an allotment of 200 hrs.
Program has STOPPED.
Time Used: You have used 0 hrs, 48 min out of an allotment of 200 hrs.
Program has STOPPED.
Time Used: You have used 0 hrs, 52 min out of an allotment of 200 hrs.
Program has STOPPED.

Any help would be appreciated.