well i sent them an email-here is the reply
Thank you for contacting Ancestry.co.uk regarding the numbers you are seeing rather than place names for some of the tree hints you receive.
Some members had this problem when they saved certain records to their tree. This problem is no longer ongoing, but some people still have the incorrect information saved to their tree. In order to fix this they will need to save the record to their tree again so the place name will be saved instead of the number.
If you need additional assistance, reply to this email or feel free to contact us by phone at 0-800-404-9723 from 9 AM to 10 PM GMT, Monday through Friday or from 9 AM - 8 PM GMT, Saturday and Sunday.
Customer Solutions Associate