I wouldn't say that the decisions made by the officials were wrong. In most cases, the decision made by the visa officer, the immigration officer, is correct, because the decision was based on the facts that were before him. The facts in front of the IAD may be quite different, because by this point the appellant and the applicant have been together for a longer time. They provide us with more information and sometimes different information than what was before the immigration officer.
On March 3rd, 2011. See this statement in context.