omeka.net - CSV not importing multiple files

I have a csv file for importing records into Omeka, which has multiple files for each record. I've put each file URL in a separate column. I've done the mapping correctly (checking the "File" box for each column I want to import) but it's only importing the first file for each record. Is this a known error? Is there something I can do to work around it?

You should be able to put all the files for each item in one column by putting quotation marks around them all, and separating by commas.

The test.csv file in the csv_files directory gives an example of that in the first row.