Loading DS in Script Resets All Dropdowns

I'm working in DS 1.6.  I have a set of five Dropdown boxes.  In one of the Dropdowns, I've defined a script for the On Select as follows:

var section = DROPDOWN_SECTION.getSelectedText();

DS_REPORT.loadDataSource();

APPLICATION.setVariableValueExt("psEnter Section ", section);

This sets a value for a prompt and then loads the Data Source.  It works, but it has an odd side effect.  When the Data Source loads here in the script, it resets all of the Dropdown boxes to their first values and you lose the values previously selected.  But, I want to retain the values already selected in the other Dropdowns.  Anyway to deal with this behavior?