Why is the CPU usage show between 98% and 100%, even if the usage concurrency load is not very high?

Why is the CPU usage show between 98% and 100%, even if the usage concurrency load is not very high?

When Hierarchy Level is changed from the Standard, the graphs need to be reconfigured. Filters of existing graphs will get invalid and application goes for infinite loop, showing CPU usage up to 100%. Example -Reconfigure all the graphs containing "Store" as filter. Make sure that Store filter appears only once while configuring.