Duplicate MAC but different IP? Am I being hacked? [closed]

Duplicate MAC but different IP? Am I being hacked? [closed]

References

Reference NO 1

http://superuser.com/questions/559085/duplicate-mac-but-different-ip-on-home-router

Reference NO 2

https://discussions.apple.com/thread/2268121?start=90&tstart=0

Reference NO 3

http://forums.macrumors.com/archive/index.php/t-918534.html

Reference NO 4

http://www.proprofs.com/forums/index.php?showtopic=13620

Reference NO 5

http://mac.bigresource.com/MacBook-Pro-can-someone-hack-while-knowing-the-IP-l9zetVpta.html

Reference NO 6

http://osxdaily.com/2010/09/19/another-device-on-the-network-is-using-your-computers-ip-address/

Reference NO 7

http://www.softpanorama.net/Net/Internet_layer/arp.shtml

Reference NO 8

http://forums.cnet.com/7723-6126_102-570230/imac-won-t-connect-to-internet-anymore-using-wireless/