dslr595148 and Anti-Phish,
By 'MAC Address Filtering' do you mean using 'Wireless MAC Authentication' screen on the router menu that you can get to by navigating through Wireless settings/Advanced security settings/wireless MAC authentication screens? If so, then yes, I have it turned on. On that screen I have checked the box 'Enable Access List'. I then entered a list of 10 MAC addresses that I wanted the router to allow wireless access. My thinking was that this would prevent any unauthorized access to the network.
Are you saying that this setup is not effective/useless and is the reason why I can only put in 10 MAC addresses on the screen? Should I then just turn it off and put in all the MAC addresses I need in excess of 10?