I don't think you need detail and append templates on this sample - just one three-line detail template, trapping on line 1, col 11 ("-"), and the advanced field properties on line three of "preceding string"-"nbr rtns: ".
Lines four and five you can pick up with a conventional footer template. The sample looks easier to manage when you trap the bulk of the data on each line as one long text field, as you can always break these up in the table using calculated fields.
I think Olly's observation about extrating the data as a long line single field looks right here.
Given that the format of the lines in the sample is not consistent any template trying to extract field by field might be challenged to do so.
I would be interested to know what you have defined in the templates for this model. Would you model work with a cut and paste copy of the sample you posted? (Sometimes things get a little messed up in posting.)
If so I could have a look to see what possibilities might exist. If you want to do that send me a PM though the forum with your email address and I will provide email contact details.