WNDR4300 Router still blocking sites removed from List

I tried to set up a parental control to block YouTube on the NETGEAR router listed above.  It is running the latest version of the Firmware (V1.0.2.98 as of this message)  I attempted to block YouTube by going into Advanced --> Security --> Block Sites, and adding youtube as the keyword.  I get a message on two Kindles saying that access to YouTube is restricted: "Web Site Blocked by NETGEAR Firewall."  However, I could still access the site on the PC (Chrome in Windows 8)  I had set the time for YouTube to be blocked from 8 PM until 5 PM.

The annoying part is that once I removed YouTube from the list of blocked domains (Advanced --> Security --> Block Sites --> Clear List) I am still getting the message on the Kindles saying that YouTube is blocked by the Firewall.  I have cleared all of the blocks that I can see from the Router, and have rebooted the routers and the Kindles as well.  Do I need to do a factory reset on the router to clear this blockage?  Did the time setting mess the Firewall up?

Thanks for the help!