In order to display news that are past the publish to date you could use the Repeater with custom query Web part which does not check the published status. There is an example of this Web part (using News articles) available in the sample Corporate Site under /Examples/Web-parts/Listings-and-viewers/Custom-query/Repeater-with-custom-query.
As for the RSS feed, since I was able to reproduce this behavior in the latest version this seems to be caused by a bug. I will check with the development team if there is something specific that is causing this but in the meantime you could use the following WHERE condition as a workaround: Published = 1
Please let me know if you have any additional questions.