RQM: Excel Importer: how to import multivalued testcase categories?

Im trying to import to RQM over the Excel importer testcases. Have define in RQM some testcase categories as multivalued. My question is how to modify my cfg file to be able to import multivalued entries.

Currently:
in cfg file: testcase.category term="Test Phase".value=L
and in xls file in column L the entry:  CVT,pre IVT

leads to



or
in cfg file: testcase.category term="Test Phase".value=K
and in xls file in column K the entry: AIXGPFS, WIN_2008_ENTERPRISE_EDITION
create additional Items (like for supported platforms):


My expectation would be to see something like: