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You are correct; that does seem a bit unclear. The description in Norton Ghost 14.0 User Guide describes the functionality much better:
Schedule a base recovery point with additional recovery points that contain only incremental changes that were made to your computer since the previous recovery point.
The last part that I bolded seems to be the point of contention with the previous information in the user guide. Thank you for pointing this out. I'm sure other customers have been equally as confused by this text.