group filter works differently depending how you navigate to it

Products

• CA Performance Management - Usage and Administration
• DX NetOps

Issue/Introduction

admin/group settings/groups
then
all groups/technologies/WAN/group
1294 doesn't include retired devices (expected)

inventory/items/devices
click filter thing
all groups/technologies/WAN/group
1306 which includes retired devices (unexpected)

Inventory view and group editor have different number of devices 

Environment

Release : 21.2

Component : Performance Management Groups

Resolution

The way inventory works is that it not only adds the group and its subgroup it also deduplicates items between the groups. So if an item is in the parent group and both sub groups it will only count it as 1 item.

Inventory is the group and it subgroups with a distinct filter to deduplicate if the item is in the group and a sub group(s). In the group editor view its only the items in that group it self. This is why you see the discrepancies between the group editor and inventory view.