Legal model reporting in BPC10 Netweaver

Hello,

I'm creating a report in the Legal model in BPC10 Netweaver.  When I try to place Groups to the left of an entity in the row axis (or on top of entity in the report editor), those rows will not appear, even when I have "Keep All" selected in Sheet Options - unless the entity is CSO, then it works.  If I place Groups to the right of any entity in the row axis, everything will appear as expected.  Is there a good reason for this, or does this sound like a bug I should look into further?

Thanks!

Angela