Consolidation Worksheet Data Sequence.

I'm consolidating 3 worksheets into one by using Excel 2007 data
consolidation. The worksheets have a product number in column A and sales
figures in columns B, C & D for Jan, Feb and Mar. The worksheets are in
product number sequence. Not all product numbers appear on each sheet, so I
consolidate by category using "labels in left column" and "create links to
source data" to create a consolidation sheet in outline form. The problem is
the consolidated worksheet is not in product number sequence as I need it to
be. I have books on Excel 2007 and Excel 2003 and their consolidated
worksheet examples are not in sequence either although their input sheets
are. Any ideas? Thanks.