Not seeing the Events populate to the Group level, device duplication (FQDN and short name), and messages are not showing up properly for users based on role based access
 

The root cause for the symptoms is that both short names & FQDN are coming from various sources. 

TSIM requires a unique value for FQDN from all the sources (e.g. Patrol Agent, CMDB, remote KMs, etc.). 
In other words, TSIM would treat hostA and hostA.company.com separately.

Normally the solution is straightforward: use FQDN consistently.

However, if this cannot be done for some reason, and if the pn_device_name slot always has the FQDN value, the attached MRL will enrich the mc_host slot to the FQDN value from the pn_device_name slot.

Follow the steps to deploy this rule :
1. Stop the cell
2. Copy the EnrichAlarmHost.mrl in CELL kb\rules folder.
3. Edit .load file under the rules folder and at the last line add the test rule i.e. “EnrichAlarmHost”
4. Compile the cell
5. Start the cell