Mass Update Confusion

Being a relative novice to the world of JSON and Roku, my channel updating process is driving me crazy. When I update the URL, it says all videos have ingested properly.

When I preview the channel, I see the updates reflected in both the background image, categories, and the video thumbnails.

All is well, so I Publish and see the Splash and Background images updated...but the actual videos haven't changed one bit.

Videos I've deleted are still there. New videos added are not there. New Categories are not there. 

I waited overnight to see if it was just a matter of timing, but still nothing has happened.

Does anyone out there know where the problem is with all this? It's driving me nuts. I'm happy to provide the JSON URL if needed. Thanks!