Unwanted events are also logged in the view created for a specific target from the rules created using its base target

I have created Event or Alert view using a target "My.Target" which is derived from a base target "Windows Server".

All the events or alerts are captured correctly from the servers discovered by "My.Target" but the same view also shows the events and alerts from other servers which has a rule created with a base target "Windows Server".

Is there any option to filter the base target at view level other than using a custom field as it doesn't work for the alerts generated using "Monitors".

Any help would be greatly appreciated.

Thanks in advance.