How are template documents supposed to work?

I saved a iWork Numbers document as a template (and if I look at the file's file information in Finder, the template checkbox is checked). I later opened this template document on computer A and filled in some values. I didn't even actively save it (but Numbers automatically saves document continuously). Next I opened the same template from computer B - and lo and behold, the values I had entered at A appeared on B!?!? I thought templates worked by forcing the application to create a new "untitled" document based on the template that you by default saved under another name than the template. In other words, if you double click a template in Finder ten times you will have ten identical documents in Numbers named Untitled 1 to 10 based on the template (e.g. with some values and formulas prefilled), but that doesn't seem to be the case. **How are template documents supposed to work? How do I achieve what I describe above - i.e., create untitled documents based on an existing document without altering the original file?**