FCP exports unwanted titles, which I have been disabled in the Project

I have created a project that includes titles, with the intention to make two different versions of a video clip: one with titles, and one without. The plan was to just disable the titles (V) to generate the clip with no titles.

This did not work. The final clip still had the titles, even though the preview in the export window showed the clip with no titles.

Then I made a copy of the original project, and removed the titles completely. To no avail. The titles were still showing in the exported clip.

The only way that I was able to keep the titles from showing up in the exported clip was by disabling the audio track. It seems that there are phantom titles that are attached to the audio track, even though I have deleted them from the project.

Does anyone know why this is happening and how to correct it?