I have created custom product statuses, and have managed to figure out how to manually assign them in the product editor.  However, when I upload a product file, all products in the upload file are switched to the default product status.  I've tried a bunch of different ways of entering the status name in the spreadsheet, but they don't ...

One possible solution is to make sure you have no hide columns/rows. Secondly, select all columns that 'appear' to be blank to the right of your data and then delete them... repeat the same process for all rows that 'appear' to be blank under row 23. Sometimes these rows/columns contain info that is not visible and is only detected by the import ...