There is a ServerMonitoring.yml file under <machine agent home>/extensions/ServerMonitoring/conf directory. Under the section, VolumeMonitorConfig, there is a maxNumberVolumes parameter that is defaulted to 5. Changing this value and restarting the MA will increase or decrease the number of volumes seen under Volumes in Servers. I can't speak to the other requests but that is a start if you haven't already receive an answer or given up. Note that an upgrade will overwrite this value. I know because I have done this before and was on here searching how to do it again when I stumbled onto your thread. Good luck!
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