EPs in RemoteControl (defaultgroup) not synchronized with EPs in RMM

Hi,
in the past few months I noticed that in my group “stefano” I have 10 EPs
and so in RC,

but in RC “stefano/Default Group” I see 18 EPs


those 8 are EPs that belong to other customers and are regularly reported in their own groups.
Is this behavior normal?
Thank you.