usually they are all parameters from scenario which get populated. could you compare the *.asc file of default template to the new template? try matching them to the default template.if you see any of the below <%xxxx%> try removing them. (but before trying any of this,please make a backup of default and your template). longshot but worth trying
Project Name: <%CompanyName%>
Test Name: <%SessionName%>
Test Description: <%TestDescription%>
Run Time: <%RunDate%>
Duration: X hours, XX minutes and XXseconds.
User Notes: <%UserNotes%>