EpicomboBox manual setup - limit dropdown list columns to the display member?

Hey,

I have an epiComboBox connecting to BAQ output. It’s working fine, but the dropdown list looks like this:

image

And here’s the code that sets it:

cmbQualityCode.ValueMember = "UDCodes_CodeID";
cmbQualityCode.DisplayMember = "Calculated_QualDesc";
cmbQualityCode.EpiSort = "UDCodes_LongDesc";
string[] columns = new string[] { "Calculated_QualDesc" };
cmbQualityCode.EpiColumns = columns;

What am I missing?

Thanks,

Joe