Google Spreadsheet export options

It seems like the "Replace" and "Merge" export options don't work as I expect them to. If i have an existing spreadsheet, with 2 terms in the default sheet (uncategorized in the component), and add a third, but give it a category of "cat01", both the "Replace" and "Merge" export buttons will not add the actual third term. They do add the new "cat01" sheet however. The "Add New" option does seem to do the expected thing, and will add the new term to the "cat01" sheet.

I don't know if this is simply my misunderstanding of how each of those options should work, or is a bug. I expect both of those options to add the new third term to the existing spreadsheet.

Thanks!
Jos

Merge was _not_ adding the new items, either on export or import, specifically around items added to new categories. Add new was working as expected. Replace also didn't seem to actually add the new terms either.