On 5/7/2018 4:40 PM, GS wrote:
....

What the answer is is what Excel thinks the data are and how will be
exported; what we don't know is whether that is the same as what the
foreign system thinks they are for the two cases--my gut feeling is
"there be dragons!" but don't know for sure.

Agreed!

Ah! We finally(!) got to the point was trying to make... :)

There's "knowing" and then there's "knowing"...and the two aren't always
necessarily the same.

--