Well, I think I've figured out WTH has been going on at Wunderground. Seems when you go to My Profile / My Devices and then select a webcam, the link is incorrect. To get to the actual image you have to go to a directory that's some offshoot of your camera name.
In my case, one of my cam names is 'ttroglioCAM3'. So my link happens to be for any particular day;
www.wunderground.com/dashboard/webcam/ttroglio/3/YYYY-MM-DD.
And when I typed that in, low and behold, the images appear, all the way back to New Years Eve. I can select any date and see all the images that were posted. It's also where multiple cams appear and I've verified the other cam I set up works as well since it's cam 4.
I can't see it off my
home weather page at the bottom for some reason. If I click that link it really just takes me to a dead directory.
So obviously it's a coding error at WU which I don't expect will be fixed soon. Strange because I see other users home weather pages and I can see they webcam. I'm using FTP if that matters.