numvbscriptengines

We currently have set the numvbscript engines to 64.  However when logging rule performance I note that all entities seem to fully execute before moving on to the next entity.   In the past I have seen that there are multiple entity calculations performing at the same time which then results in a log file that has entries of various reporting entities.  So by the looks of it, it seems that the application is running in a single thread.  Something I can also see when I look at the CPU usage as most of the usage is on a single CPU.

Are there any other settings that will make the system multithreading.