Inconsistency between number of instances versus quantity of resources

I have a question in a simulation. In one of the tasks I assigned 12 resources and in 3 days 858 instances were completed according to the process, time and calendar configuration. In the same task I reduce resources to only 2 and the number of completed instances increase. Does this seem like a paradox to me, in my understanding should I also reduce the amount of tokens completed or am I wrong?

I am simulating a 1 level and 2 level Call Center.

Could you clarify this? Attached to the settings to assist in the analysis.