CKQueryOperation returning duplicates

    func queryForTable() -> Void {

    self.arrayOfFoodItems.removeAllObjects()

    let container = CKContainer.defaultContainer()        
    let resultPredicate = NSPredicate(format: "TRUEPREDICATE")
    let query = CKQuery(recordType: "FoodItems", predicate: resultPredicate)

    let queryOp = CKQueryOperation(query: query)
    let operationQueue = NSOperationQueue()

    executeQueryOperation(queryOp, onOperationQueue: operationQueue)

}

func executeQueryOperation(queryOperation: CKQueryOperation, onOperationQueue operationQueue: NSOperationQueue){

    queryOperation.database = CKContainer.defaultContainer().publicCloudDatabase
    queryOperation.recordFetchedBlock = self.addRecordToArray
    queryOperation.queryCompletionBlock = { (cursor: CKQueryCursor?, error: NSError?) -> Void in

        if cursor != nil {
        if let queryCursor = cursor{
            let queryCursorOperation = CKQueryOperation(cursor: queryCursor)
            self.executeQueryOperation(queryCursorOperation, onOperationQueue: operationQueue)
        }
        }
        else {
            self.sortToSectionsAndReloadData()
        }
    }

    operationQueue.addOperation(queryOperation)

}

func sortToSectionsAndReloadData() {

    for (var i = 0; i < self.arrayOfSections.count; i++) {

        self.arrayOfArrays[i].removeAllObjects()

        let prefix:String = self.arrayOfSections[i]
        let array:NSMutableArray = self.arrayOfArrays[i] as! NSMutableArray

        for object in self.arrayOfFoodItems {

            let name = object["itemName"] as! String

            if name.lowercaseString.hasPrefix(prefix.lowercaseString) {

                array.addObject(object)
            }

        }
    }

    NSOperationQueue.mainQueue().addOperationWithBlock { () -> Void in
        self.tableView.reloadData()
    }
}