MaximumErrorCount is set for each container. For example Populate ADO Variable is set to 1 because if it can't set the variable there is no reason to attempt the other containers. Most of the remaining containers are set to 999.

If your MaximumErrorCount is set correctly for all containers, you can try running the script for just the just the servers you are missing and maybe find out why they are missing.

You can also run two two copies of these packages, with each one processing a separate list of servers