It was a misunderstanding on her part, not a deliberate 'deception' on his (part). [=he didn't try to deceive her or lie to her]
The article describes the government's use of 'deception' [='deceit'] to gain public support for the program.
She 'practiced deception' on her unsuspecting clients. [=she deceived them]
(..) I don’t think they would have ever brought us back from the outer rim sieges. - Wait. Not here. - Yes, here. I’m– I’m tired of all this deception. I don’t care if they know we’re married. Anakin, don’t say things like that. Are you all right? You’re trembling. What’s going on? (..)2005 Star Wars: Episode III - Revenge of the Sith