You are right, but it's also another way of viewing repeated data and deleting it, depending on how your spreadsheet is set out. At least I have used it this way a few times.
How is your spreadsheet set out?
just as a huge page of postcodes entered into cells, about 80 columns x 80 rows, no headers, or anything sensible! It's how the info was given to me, and unfortunately I had no control over that!
Hmmm! 'katiesara' I was offering to sort the file for you (no charge of course! as I have a fair bit of spare time and am up for a challenge.), but obviously couldn't post the email address for contacting me. The offer still stands, but not sure the best way of contacting each other!?!