Board Thread:Support Requests - Getting Technical/@comment-4594870-20130516125453/@comment-957747-20130516175532

If you restore a page with multiple comments, you have to wait until they are all restored before deleting again. Otherwise, only those that have been restored at the time of deletion will be deleted. The rest will still be restored.

The pages themselves have to be manually deleted with either a delete page manipulation (1 by 1), a bot, a background task, or an API call (also 1 by 1). It's best to request this action from a staff member through Special:Contact/general.