You are missing something and CJC's examples explain it perfectly. The ROH thing was related, but DA didn't work Meltzer by giving him accurate info about TNA while neglecting to tell him about this other promotion working a deal. Like CJC said, had they fed Meltz false information then he got worked. They didn't. They just didn't tell him about something else that might be of interest to him, but none of his TNA info was misleading or inaccurate so far as we know.
TNA, who you would think should be privy to that kind of information, got worked to a degree because they had no idea that their network was negotiating with another wrestling promotion.