I just want to confirm the operation of the OLAP Filter search. It has been our observation that one can "add" to the filter only if the existing filter has more than one filter vlaue. Is that correct?
You can add members to the existing filter only if the filter in the multi-select mode. In multi-select mode, you will see "Add to existing selection" option that has to be checked.
But our testing indicates that if the GUI shows multi-select and only a single item has been previously selected then no other items can be added to the filter.
If the GUI shows multi-select and more than one item has been previously selected then the “add to existing” filter works perfectly. Maybe we are missing some step.