When creating a drag and drop report for alarm reporting with the Alarm Filter applied, all alarms are displayed within the report.
This is caused by the bug FGLUI-11885
Waiting for fix in a future release of vFoglight.
Workaround:
Within the Alarm filter, select which alarms are to be shown in the report.
Log out and back into vFoglight, after which the alarm filter, filters for the requested alarms.
When the alarm filter is changed again, the filter is not engaged until the user logs off and then back in again.