You need to make sure if you have made additional template sets that you have made all the appropriate files cause you have created an additional template and I can assume this is your issue.
FAQ--How to Create Additional Template Set's in Classifieds
You should have an editproduct4.tmpl,showcat4.tmpl,uploadproduct4.tmpl and showproduct4.tmpl files.
I can quote you on any custom work if you email me with specs. Before you go trying to pay someone to fix your issue I suggest you read the link on how to create additional templates and see what you have forgotten to do.