Multiple Date Grouping

[Stacks00]

I am creating a form for people to put agenda items on for a meeting held
weekly. Currently the assistant takes the agenda items and assigns them
dates. The assistant then submits it to a SharePoint library where agenda
items are grouped by date then sorted by start time(which she also assigns).
The problem is some agenda items are recurring. Is there a way to assign
those additional dates, submit it to SharePoint so the same agenda item will
show up under multiple groupings? I have tried a repeating table and merging
the values, but SharePoint only picks up the first date.