Custom Frame Labels
When diagramming a play in the Draw tab, you can edit the Frame Label of the play, as detailed here; Adding text to diagrams - Frame Labels. When you add a custom Frame Label to a play and then add that play to a playbook, this will affect the way that your play appears in the playbook. Within the Playbook Settings Menu, you have the option to set the Title or Subtitle of the play as the Play Name.
When using the default Frame Labels (Frame 1, Frame 2), setting Play Name and Frame Label as the Play Title and Subtitles will appear as below.
When you set a custom Frame Label, the Frame Label will override the Play Name for that frame only, which you can see in the first play on the top line. Plays without custom Frame Labels However, if you have set the Page Subtitle setting to "Play Name", then this custom Frame Label will also be used for the Page Subtitle.
Turning Off Custom Frame Labels
If you do not want the Custom Frame Label to overwrite the Play Name, you can deactivate this option. First, make sure that you have Advanced Print Settings enabled - to set this up, please read Advanced Printing Options. In the Playbook Settings Menu, uncheck the Use Custom Label as Play Name option, which will prevent the Frame Label from overriding the Play Name.