The content inside most of my sidebars was eliminated

The content inside most of my sidebars was eliminated and replaced with the content that existed inside a single custom sidebar (one that I planned to delete).

I recently had the creators of my theme create a customized widget for me. I'm submitting a ticket with them as well. But, I'm not clear why it would be related to the child's theme. As I reassembled widgets after installing the child's theme, I checked each side bar and the content was fine. However, when I viewed the site - all the content in my side bars were replaced with the content of a single side bar. Disaster. Hope you can help.