Solved the problem. The store was corrupted, so I built a new store and the above problem went away.
For what it's worth: I recommend not following the installation instructions, in part. When the instructions say to upload the extracted files from the downloaded zip file you will have to upload 6400+ files and I think this is where my problems started. Filezilla gave a few errors but also gave the impression that, through retries, it resolved the problems. Obviously not. So, on the rebuild effort I used FileZilla to upload the zip file to my server then used the server's File Manager to extract the files and place them in the correct place. It took a few more steps but less time because uploading the zip file was significantly faster than uploading all those uncompressed files, plus no errors.