I believe your DOJ statistics don't tell the whole story of what the report actually said. If you examine it carefully it states those statistics are for sex offenders that are being actively monitored by law enforcement or on sex offender registries so that parents and schools know these people should not be around children.
If Jehovah's Witnesses would just allow the authorities to take care of abuse issues, they would not have the problems they do.
edited to add: recidivism rates only include the number of times someone got caught reoffending.