I'm curious what you're seeing in the vSphere client? In my environment, it appears to be reporting active memory and matches what I see in vSphere client.
Probably best solution would be filter all esxs.
1. Click edit on Top xx resource.
2. In filter add: Vendor<>'VMware Inc.' or u can use this filter: MachineType<>'VMware ESX Server'
All Vmware esx. should excluded from the resource.