CAUSE
Word will use the first entry in a field (column) to determine what data
type is in that field. If a column contains different data types, the sort
order will vary if the first element is numeric, text, or date.
For example, the following database will have these three results when
sorted:
Original First sort: Second sort: Third sort:
numeric alphabetic date
==============================================================
24 banana 01/8/92 24
5 apple 12/12/93 5
banana 01/8/92 24 apple
apple 12/12/93 5 banana
12/12/93 5 apple 01/8/92
01/8/92 24 banana 12/12/93
Fields with consistent data types will sort or update consistently
within Word.