ECMA for exporting members (Reference type) is not capturing deletes.

Lets take an example of group say X keeping 4 members and 2 are deleted and 1 is added in FIM Portal and finally change is synchronized to ECMA Connector Space as shown below

1) delete ---
2) delete---
3) none---
4) none--
5) add--

when I perform export using ECMA , I do not receive the delete as (ValueModificationType.delete). Rather, I get 3 adds (ValueModificationType.add)   -- 2 for none (not changed in FIM Portal ) and 1 for the added one. I am expecting to see the deletes as well so that i can explicitly delete the members from AD.

I have also tried the possibility of using Capabilities.ExportType = MAExportType.AttributeReplace instead of Capabilities.ExportType = MAExportType.AttributeUpdate;

Any help would be appreciated. Thanks!! Vinay
This is the code fragment I am using correctly.

       
Capabilities.ExportType = MAExportType.AttributeUpdate;

 public PutExportEntriesResults PutExportEntries(IList<CSEntryChange> csentries)
        {

            PutExportEntriesResults Results = new PutExportEntriesResults();

            foreach (CSEntryChange change in csentries)
            {


   foreach (string AttributeName in change.ChangedAttributeNames)
                {
                    if (AttributeName == "member")
                    {
                        
                        if (attributeChange.ModificationType == AttributeModificationType.Replace ||
                            attributeChange.ModificationType == AttributeModificationType.Add)
                        {
                           
                            foreach (ValueChange value in attributeChange.ValueChanges)
                            {
                                string DN = value.Value.ToString();
                                if (value.ModificationType == ValueModificationType.Add)
                                    lstaddMembers.Add(DN);
                                if (value.ModificationType == ValueModificationType.Delete)
                                    lstdelMembers.Add(DN);
                            }

}