Hi John,
Of course the feed urls for feed manager in the database are going to be exactly what you entered when you added the feed to feed manager.
If you want to use a different feed at a different url then you have to edit the feeds in Feed Manager. There is nothing that magically changes the feed url you configured just because you moved the site to a different url. It doesn't know the difference between an external feed or an internal one it just uses whatever you configure as the feed url.
You should not edit them directly in the table though, it is best to edit them from the UI so that the feed item cache is cleared automatically when you edit the feed location and it will reload the items from the new url.
The Blog also has a setting (Feedburner Feed Url) where you may be overriding the feed url it exposes.
Hope that helps,
Joe