Because there is not any oversight in regard to Ballot Definition Files, there is no way to know if one may be incorrectly set up, to potentially allow for the wrong candidate to be elected. If there was some type of oversight, then this would not be a concern, however there is no one to ensure that these Ballot Definition Files will ensure an accurate election result.
No there is not an effective method in place that consistently assures the accuracy of ballot definition files. Ballot definition files are not inspected by an independent testing authority. Testing should uncover errors in the balot files and this testing is not in place. Therefore there are often errors in the accuracy.