Item value from dynamically populated combo box resets upon form submit

Using Acrobat Pro XI on a PC.

Have form with 2 combo boxes.  Box 2 (descriptionSelect) is dependent on Box 1 (locationSelect).  Box 2 list contains both items and values, populated from array.  The values from box 2 are used to determine format of data entered into another field.

All of this works great, except for one small problem.  When the form is submitted (to a network folder), the descriptionSelect item value does not transfer with the other form data.  Instead of the selected item description, it appears to reset to it's default value of "-".

What could be causing the selected item from the descriptionSelect combo box to be reset to "-" upon submitting the form?

Box 1 item list is already populated.  Item values only, no export values.  Custom Keystroke Script: "SetDescriptions();"

Box 2 - item list dynamically populated from array. Array contains both item value and associated export value.  Custom Keystroke Script: "SetDataFormat()".

I added a hidden text box as a possible solution - it correctly displays the selected item name, but data from this field also resets upon form submission.

Code in this text box (Custom Calculation Script):

var d = getField("descriptionSelect");

var idx = d.currentValueIndices;

var dv = d.getItemAt(idx, false);

event.value=dv;

Document JavaScript:

//Master List
// Each entry in this object literal is the name of a location (site)
// The associated value is the DESCRIPTION followed by the list value, a FORMAT designator
//100=$, 200=number, 300=percent

var Descriptions = {
Discharge: [ ["-","none"], ["Coupon Savings", 100], ["Discharge Rx Vol", 200], ["Rx Capture Rate", 300] ],

FCH: [ ["-","none"], ["A1c Reduction",  300], ["CAHPS", 300], ["Med Histories", 200], ["Med History Changes", 200], ["Patient Touches", 200], ["Patients at A1c Goal", 300] ],

FMCC: [ ["-","none"], ["A1c Reduction",  300], ["CAHPS", 300], ["Direct Care Pro Billing", 100], ["Direct Care Pro Cases", 200], ["Incident-to Billing", 100],["Med Histories", 200], ["Med History Changes", 200], ["Patient Touches", 200], ["Patients at A1c Goal", 300], ["Prior Auth Cases", 200] ],

Sr_Health: [["-","none"], ["A1c Reduction",  300], ["AWV Cases", 200], ["CAHPS", 300], ["Direct Care Pro Billing", 100], ["Direct Care Pro Cases", 200], ["Flu Vaccinations", 200], ["Incident-to Billing", 100], ["Med Histories", 200], ["Med History Changes", 200], ["Patient Touches", 200], ["Patients at A1c Goal", 300], ["Pneumovax Vaccinations", 200], ["Prevnar Vaccinations", 200], ["Prior Auth Cases", 200], ["Vaccination Billing", 100], ["Zostavax Vaccinations", 200] ],

Steeplechase: [ ["-","none"], ["A1c Reduction",  300], ["CAHPS", 300], ["Direct Care Pro Billing", 100], ["Direct Care Pro Cases", 200], ["Incident-to Billing", 100],["Med Histories", 200], ["Med History Changes", 200], ["Patient Touches", 200], ["Patients at A1c Goal", 300], ["Prior Auth Cases", 200] ],
 
};   

function SetDescriptions()
{
   // Only run this code on when the selection is committed. 
   if(event.willCommit)
   {

      // Now get the Description list from the Master List
      // Since the selection is being committed, event.value contains the selection text
      var lst = Descriptions[event.value];
     
      if( (lst != null) && (lst.length > 0) ) {
         this.getField("descriptionSelect").clearItems();
         this.getField("descriptionSelect").setItems(lst);
      }
      else
      {
         this.getField("descriptionSelect").clearItems();
      }
   
   }
}

//this function displays the data entry in the correct format
//100=$, 200=number, 300=%

function SetDataFormat()
{
    //var df = Descriptions[event.value];

    var nSelExp = 0;
    if(!isNaN(event.changeEx)) {
     nSelExp = event.changeEx
       

switch(nSelExp)
{
case "100":
    //dollars
    this.getField("amount1").display = display.visible;
    this.getField("amount2").display = display.hidden;
    this.getField("amount2").value = "";
    this.getField("amount3").display = display.hidden;
    this.getField("amount3").value = "";
    this.getField("txtformat").value = "dollar amount                               $";
    this.getField("Category").value;    
break;

case "200":
    //number
    this.getField("amount1").display = display.hidden;
    this.getField("amount1").value = "";
    this.getField("amount2").display = display.visible;
    this.getField("amount3").display = display.hidden;
    this.getField("amount3").value = "";
    this.getField("txtformat").value = "quantity (as a whole number)                  ";
    this.getField("Category").value;
    break;

case "300":
    //percentage
    this.getField("amount1").display = display.hidden;
    this.getField("amount1").value = "";
    this.getField("amount2").display = display.hidden;
    this.getField("amount2").value = "";
    this.getField("amount3").display = display.visible;
    this.getField("txtformat").value = "percentage (as whole number)                %";
    this.getField("Category").value;
    break;

//default:
   // this.getField("amount1").display = display.hidden;
    //this.getField("amount2").display = display.hidden;
   // this.getField("amount3").display = display.hidden;
   // break;

}

    }
}