Could you connect the dots a little more?

Export of the file creates a csv file with numbers in it. When using a plain text editor, what do these numbers look like?

Then opening in open office or Libre, how does this display change?

When saving/save as the file (using a slightly modified filename to support comparing) how do the numbers now appear?

Then upload and import of that row, what happens?

In a way it sounds as if the application of use is possibly converting the currency symbols to support the locale, but possibly the import file needs to have a different series of currency symbols. If this is the case, then typically such settings are specific to the cell(s) of the spreadsheet and at least for import to the store, the file should be formatted to the same as the store exports.