Hi Maree,
For troubleshooting purpose, I use Excel for Windows to check the two .xls workbooks you provided.
Here’s the result:
For the workbook having no issue, when I go to File > Check for Issues > Check compatibility, it shows “no compatibility issues were found”.
For the workbook having the messy code issue. It shows that “Some cells or styles in this workbook contain formatting that is not supported by the selected file format. These formats will be converted to the closest format available”.
I notice that the two workbooks are all .xls format. Have they ever been converted from another format to .xls? Are there any specific format or styles used in the spreadsheet? But these are all the things I am thinking of the cause of the issue. It seems that the spreadsheet has been damaged for some reason. There may not be easy to repair them. So, how can you get the work well spreadsheet back? If you have any copy of them from your colleagues or organization server, can you get all them back?
Thanks,
Rena