I have 2 pages set up with the following:

PAST EVENTS
{ListIt2FundRaisingEvents template_summary="footer" category="past-event"
orderby='custom_date|DESC' template_detail="past_article"}

FUTURE EVENTS
{ListIt2FundRaisingEvents template_summary="footer" category="up-coming-event"
orderby='custom_date|DESC' template_detail="future_article"}

The past_article is the default for the detail template. When you click through
on the future events page is is using the default rather then the future_article
template.