Not all categories being sent

I have two terms which belong to my least-weighted vocabulary, Vocabulary 1: term 4 and term 5. (The first four numbers belong to folksonomy terms.) Only nodes belonging to these two terms are being sent or included in the newsletter. However, nodes belonging to other vocabularies (and therefore not associated with terms 4 and 5) are not being sent even if these terms are checked in the newsletter settings. It's not a flexinode issue since if I assign term 4 or 5 to another flexinode content type previously without these terms (and therefore not sent), the nodes belonging to this type are then sent.