Router Internet !?!

I posted a thread before but i didint have any pics to post up so i can truly show what u meant.

Active IP Table
http://img10.imageshack.us/i/capturealp.jpg/

Wireless Client Mac List
http://img20.imageshack.us/i/capture1cv.jpg/

http://img24.imageshack.us/i/capture3qw.jpg/

I’m not sure if its somebody stealing my wi-fi or not, but its weird since i set up encrypted password and i enabled mac filter with only my mac adress.