Hi Sue,
If the information on the actual census summary page is different to the information in the transcription, all you do is report a transcription error to Ancestry. I don't have Ancestry but usually the page you view the transcription on will have a button to click and that will take you to a page where you can report the error.
If a comment was made on this forum that a correction had been submitted, it almost certainly has been. But I believe it can take up to 3 months for Ancestry to make the correction.

My Findmypast people do a correction usually within 24 hours!
BTW, there's nothing stopping you submitting another correction notice.
For a transcription to be changed there has to be an error between what is written on the summary by the enumerator, or in the case of the 1911 by the head of household, and what the transcriber entered into the database.
They cannot change a mistake that is on the actual census form. In the 1901 one of my rellies has had his surname mispelt by the enumerator. Instead of Thomas Sa******, he had written Thomas Sta******. And that's the way it has to stay!
DS
DS
Member # 7743
RIP 20 April 2015
Emery, McAnaspie/McAnaspri etc, Fry, McGibbon/McKibbion etc, Burbage, Butler, Brady, Foulkes, Sarsfield, Moon [Bristol & Cornwall].
Census information is Crown Copyright http://www.nationalarchives.gov.uk/