@sbattista09 - Were you able to find a solution to your question? If yes, was it somesoni2's link or GregMefford's answer? If no solution was found still, please feel free to leave a comment with more information.
The current number should be pretty straightforward to determine whether it's reasonable or not. The maximum is normally determined roughly by the number of cores on the search head unless you have changed you parallelization settings ( batch_search_max_pipeline setting in limits.conf).
Maybe your SHC has less cores per server than your previously stand-alone Search Head?
You can also look in the Distribute Management Center to see the number of concurrent historical searches over time.
For example, if you open a dashboard with a dozen panels that are each running an independent search, that counts as 12.