I having an issue with eagle where it visually shows an overlap error during DRC, but it does not list this error on the DRC error list. I attached below an example of this. I have found a handful of these occurrences on my most recent board, and it makes me feel uneasy that I may miss one.
I use SparkFun's DRC, but I don't think that is the issue because it visually shows the error. Somehow, it just doesn't list it.