Q: Can I edit a list that I've already uploaded into a campaign?
A: Yes! In order to edit or re-map a list that you've already uploaded into a campaign, download the "phone numbers" csv. from the import stats of the campaign (found under Campaign Stats). Delete the extra columns that Sherpa gives you so that the file matches the uploader template, make the edits, save, and re-upload to the same campaign.
Note: As long as you are not adding new phone numbers to the system, re-uploading a list this way should not count against your monthly upload limit.