It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
If you are regularly using Zotero in more than one computer for your research, Zotero Sync feature can help you keep your library up to date when using the Zotero connector.
Note: Zotero connector and desktop library must be open.