I am using WPA2-PSK [AES]. I was not using MAC address filtering to limit access. I was just looking to see what devices were attached to the network as I have recently added a new blu-ray player. That is when I noticed the issue with my wife's samsung phone's MAC address appearing twice and assigned 2 different IP addresses. Was just wondering if this was cause for concern. On a side note my nearest neighbors are over a mile away.
I am using a netgear wndr3800 router