I've been working with Zotero for a long time and have never had problems up til now. Since a few months I have noticed that certain citations in my document vary. The "normal" citation style within would be (Surname, Year), yet some citations are now appearing as (Full Name, Year), even though the data it is citing is identical. Even in the Zotero "preview" window, the correct citation style is shown, but what ends up in my document is then wrong. This variation seems completely random, as most citations end up correct, but some sources just won't show up in the correct form, whatever I try. Has anyone elhad this experience?