Thank you for reaching out to us. While our automated systems work well, sometimes they hit a snag. Fortunately, when you upload contacts via file, we give you the opportunity to manually check and make sure that the columns are correctly matched. If you're running into an issue where our system doesn't detect a column, you can click the dropdown menu to select what the field should be.
If you have any additional questions or concerns, simply reply here or create a new thread and we'd be happy to assist.