C6300 Modem/Router connection problems

My problem appears to be on the Router side of the unit.  I contacted TWC to ask about recent updates pushed through the system that might have affected my Modem/Router.  The modem tested fine.  I got the same results performing the ping test using Netgear Genie.  I was able to maintain the wireless signal for almost a day after reseting the unit to the factory defaults.  Today, I am experiencing the same wifi drop outs I encountered earlier this week.  

I doublechecked the wireless settings for 2.4 ghz and 5.0 ghz.  Both boxes are checked. Under WPS settings, however, I inadvertently clicked the "Disable Gateway's PIN" button.  I unchecked the box but I believe the button below it, labeled "Keep Existing Wireless Settings", was checked but I don't have the ability to recheck the box (grayed out).  Does anyone have a suggestion on how to reactivate/recheck this button?  I'm not sure if this has anything to do with my wireless signal problem.  I just want to get the unit back to its original factory configuration. 

Thanks,

sotey687