Any other Wifi routers in the area?
How about changing the SSID on your router to something more unique and easy for you to identify, something beisdes dlink. It can be anything.
Just read this for a second.
There is one other wireless connection I can pick up, but it's so far away I don't even get a bar on it, I live on an acreage and my neighbors are far enough away that if we do see each others wireless networks it's for a brief second with almost no connectivity.
I know they're both from my router, why? Because if I change the security settings on my router, I have to go into the properties of D Link and change it, but the "Connect" stays grayed out and it won't let me connect, if I set the security settings on D Link 2 to the same as D Link, it suddenly lets me connect and everything works fine.
Changed the SSID and the other SSID is gone, it did this last time but reappeared as soon as the router was reset.