When creating a view for details of the VMs as shown below , you select a single OVDC object in preview source, you are also seeing VMs from other OVDC resources in the preview output. This is happening when both OVDCs are in the same vCD tenant.
Aria Operations 8.18.x
Management pack for vCloud Director 8.18
Aria Operations uses relationships to build the list of VMs, Since this environment is using shared edge gateway across OVDC's in an Org A Virtual Machine is indirectly linked to 2 OVDCs under Same Org
This is a product limitation as there are indirect relationships between VMs and other OVDCs.
Workaround:
Use a filter object in the view to filter VMs for a single OVDCs