Hi Sam,
If you would like to use Package Servers in your enviroment, customize the Package Service Settings:
"Delete package files if they are unused for" is configured for 7 days. If you change to 0-3 days, problally you´ll decrease the package numbers in your package server.
http://www.symantec.com/docs/HOWTO62654
In the Software Package, you could configure witch you need to be replicated to package server.
In the Policy and Package Settings of Patch Management configuration (Settins\Software\Patch Management\Windows Settings\Windows Patch Remediation Settings), configure the "Delete packages after:" option and Package Distribution, check out the package servers.
Regards,