A family of Microsoft word processing software products for creating web, email, and print documents.
You can update the fields that Word uses for captions by switching to Print Preview (click File | Print) and then exit the preview (for example by pressing the ESC key).
That said, now that you have added excessive captions, you will have to delete them. If the captions have been added in text boxes (which happens when you add a caption to an object whose Text Wrapping is NOT "In line with text"), you will have to select and delete the entire text box(es).