As you may know, a Drawing Template stores all of the Document Properties settings that you need. It also contains a Sheet Format file containing your border and title block information. For more details about these two file types, you can read through http://www.javelin-tech.com/blog/2012/01/drawing-templates-sheet-formats/.
The Drawing Template actually stores the Sheet Format in any active sheets when the template was saved. However creating a new sheet in a drawing will look to the Sheet Format reference. If this reference cannot be found, it must be updated in the Sheet Properties. Watch the video below to see how to relink the reference.