Names Change In Spreadsheet Import

Every month I download an Excel spreadsheet from a vendor and import it into Access 2003. Even tho the first row has column names, a dozen fields have incorrect names and data types and I have to manually change them each time. The spreadsheet has columns representing the amount spent for specific months. The column names are all like "May-02", "Sep-03", etc. and are all currency. After the import, many of the fieldnames are like "1/5/02 0:00:00" instead of "May02" and the data type is text. The column formatting is "mmm-yy" on all the columns, even the ones where the field names match the column names. How do I get all the fields to import correctly?