How Siebel CRM Sorts a Multi-Value Field
If Siebel CRM references a multi-value field in a sort specification, then it does the following sort:
Sorts on the initial value of the multi-value field. You must use this configuration only if the multi-value group references a primary foreign key.
Does not sort the records that reside in the underlying multi-value group. To sort these records, you must create a sort specification in the child business component of the multi-value link.
For more information, see About the Multi-Value Field.