This reads like a question better posted to the FM Pro Forum instead of Report an Issue (Which is intended for reporting possible software bugs).
What you describe can be done and in quite a few different ways. I'd need to know a lot more about what you've set up and how you want to use it before I can suggest a way to do this.
Is each date in your "list" a differerent record in the table or do you have multiple fields for this in the same record?
What do you want to see happen when this last date attended is chosen? Is it used in a calculation? Displayed? or ?