for anyone who finds this thread later, things that helped me get images straightened out were:
1. start with a smaller dataset and verify all details in spreadsheet are complete. case counts! many of my images weren’t showing because the file name was .jpg and the suffix of the imported image was .JPG
2. make sure upload file has the four minimum fields for importing.
3. make sure your text file is delimited properly. make sure commas in body of description text is not creating a new field.
now… on to figure out why hierarchical categories are not working for me!