Excel Power Query date format messup

I'm not sure about this, but I think Power Query is recognizing the date per your locale, and not per the short date settings. I suggest one of these two solutions:

  1. In Power Query, when you change the Date Type setting, do this by right clicking on the column header. Then select Change Type --> Using locale. You should then have the opportunity to select English(US). or
  2. Use the Legacy Wizard which should give you the opportunity to specify the source date format at the time of import.