Using Dates in Client Expressions

Hello, I am running PTP 7.3.1.4 and am trying to make a series that captures either the current date or an old date when a certain series is changed.

I have made two date series that use a server expression to capture the current date (sysdate from dual) and a dummy minimum date (to_date('01/01/1999','MM/DD/YYYY') from dual) and those work fine, displaying those dates in the series.

The other series that I am making is trying to use those to either display the minimum date (default) or the current date (if another series, Match Exp Entry, is modified).  It also has an Update Field of a column on promotion_data (although the issue happened when I did not have an update column)