Hi Chris,
I'm afraid there's no way to reorder the maps. I'm sorry I can't be
more help on that.
On the bulk upload page there is a sample spreadsheet that you can
download. That's generally the best way to try and figure it out. You
can also create a map with a few icons on it and then export it to
Excel which will give you a good idea of how to create the spreadsheet
as well.
If you have any specific questions about it we can help out as well.
Best,
Jared