I did a search from Developer Tools in Admin for templatename.php.
I also did a search on the server for the same. I found seven locations. I wrote down all the paths for each found and went to them individually. I have looked at them three different times to make sure there are no spaces and the single quote marks are present w/o spaces. There is still one file missing.
I wasn't using a log before while working on Zencart, but I am keeping one now that lets me know if it was admin or ftp, what the filename was, and remarks - what was changed and why, and the date and time!
The file has to be one where the custom template name had to be used or called out. I was going to check De-bugging log in cache to see if anything has shown up while I was searching each of these files over the past two days. STILL SEARCHING!
Thanks for your help