I'm afraid your problems need separate investigations as they are different. Policy enforcement (or other ePO server - agent communication) related problems show up in the McAfee agent log (also see debug logs: current or backup).
You can access the agent log via the browser log UI: http://hostname:8081 (this only works if you enabled remote access to agent logs centrally in ePO and this policy successfuly enforced on clients - otherwise you have to manually look for agent_hostname.log/xml on clients)
Update problems show up in two different log files, depending on whether the update is taken place via default AutUpdate or a managed ePO update task.
Having a managed update task is not promptly showing in VirusScan console, only after you enable the Show managed task in VirusScan console option in ePO-McAfee agent policy.
/Also, just out of curiosity, what method do you employ to install the mcafee agent on computers? for example on new computers../