Hi, for Automated addon, please open a support ticket.
BTW the theme preview is simply a generic preview of what the theme could generate. The newsletter preview is what it would be included in the newsletter IF it is generated in that moment (since the generated newsletter depends on the new content).
If there is new content and the filter selection on automated should get it out but it doesn’t happen, there could be a bug or a problem into the theme.
Which version of automated are you using? Version 4.4.2? Which theme are you using? The default one or a custom one? Please note: the “theme” is not the blog theme, but the automated newsletter theme.
Stefano.