Nothing, other than expecting ACD-A to know what your sequence is. Either tag the windows, one-by-one, in order, or do what you are doing and then use the renumbering tool to get the numbers in the order you want.
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David Koch
Autodesk Discussion Group Facilitator
Using ADT 2004 at work; access to 2005, 2006, 2007 & 2008 at home