Import filter author name order doesn't work

I’m using an import filter that consistently imports authors’ names the wrong way round. The import file has them as “<first name>,<last name>” and, when imported, they show up as “<First name>, <Last name>”. E.g. “Albert,Einstein” in the data file imports as “Albert, Einstein” in Endnote.

I’ve tried editing the import filter for Author Parsing so that the name order shows “First always precedes last”, but this makes no difference (and I’ve specified the last and first name separator to be a comma). The import happens the same way whichever selection I make for Name Order. Does anyone have any idea what I’m doing wrong?