Is it reasonable to assume that the actual number is 50 times higher? Please decide for yourself instead of just taking the EFF's word for it.
Also, when considering the scope and scale of these violations, recognize that little distinction is being made between simple violations of procedure and scandalous invasions of individual privacy. If you feel that violations of Constitutional rights are more significant than missed administrative deadlines, this is an important distinction, one that the EFF's "Big Number" only serves to obscure. In fact their own report states that the number of violations involving "violation of the Constitution, the Foreign Intelligence Surveillance Act, or other laws governing criminal investigations or intelligence gathering activities" is "almost one-fifth" of the already much-deflated total.