we're using XTract QV with a couple of FI stuff like 0FI_GL_40, 0FI_GL_20, 0FI_GL_21 and yes, these guys are extracting hidden fields for whatever reason. But we never had any problems with the records. Are the records doubled on your side? Have you tried other stuff than 0FI_GL_20? Do you have additional records with the other extractors as well?