jQuery Grid Plugin - jqGrid

If I have a grid that has grouping and also has paging, I am seeing a weird error.  For example, if one group has 450 rows of data and my rowNum value is 150, I am seeing that the group containing 450 rows of data is being brolen up into 3 pages in the jqGrid.  This I expected, however, I am also seeing the summary/total row for each one of these pages and the totals are for that given page only (i.e. for the subset of the group).  I expected to see one group, with 3 pages, and one summary/total row for the entire group.  Instead, I am seeing the same group repeated 3 times, each time one third of the rows of data is displayed, and 3 different summary/total rows.

To me this appears to be a serious bug.  Can you please address or elaborate on the reasoning if this is working as designed?

Thanks.