@terziyski Sorry for not following up earlier as I did not receive an email notification that there is a reply to my posting.
Thank you for your help and instructions, I did not know of these "offline" lists, so I learned something new.
But still, there must be a list of all "once" connected devices which are not listed in the screens you showed me but I do see them through Parental Control, so when I go to PC to "add" a device, I do see a list with some devices that once connected to my network, like my cousins which were not ere for the past 2 weeks but I still do see their devices listed through PC. Those devices are NOT listed through the DCHP Client list nor ARP list. They are listed under the "OFFLINE" devices.
