How to get subscription digest messages in chronological order

Thank you for the reply, that does look like something I can consider.  Do you know if it will work in the email templates, though?  It seems that the templates don't use pure Freemarker, but some shorthand of it.  I say this because they don't enclose the freemarker syntax in < > brackets like pure Freemarker would be, so I'm confused as to what tools are at my disposal in the email templates.