I have tried looking into Info Sec's posts for a related issue but couldn't find a solution as my problem is a bit specific.
I have been having connectivity issues, and as paranoid as I can get, i wanted to see if there was any foul play as I was finding a lot of strange, sporadic appearances of Wifi networks in my vicinity.
Prior to these networks appearing I had no connectivity issues. Regardless, to simplify and get to the point, I went to take a look at the attached devices on my router administration page to suss out any potential intruders.
I've just come up to see two mac address appearing on the list, however I am the only connected device. To clarify I am connecting to a Wireless Extender.
This is where the issue is: The two Mac Addresses are ALMOST ALIKE save for a 1 digit variation. However what is interesting is that the Mac address that is not my NIC's original physical address is assigned to my IP and Vendor {MSI} while my original Mac address is listed as an unknown.
(I have attached the image of my devices page below to show this.)
Is there a possibility that I may be Mac Spoofed or am i being too worried? I am not familiar with protocols or measures used by routers as I am a home user. Perhaps the router needs to duplicate my mac address and amend it for internet connectivity?