Ad Group Performance report download missing data

[angie...@simplisafe.com]

So I found that when I download the adgroup performance report in the API, it includes fewer ad groups than when I download from the interface. Did I do something wrong? 

The code is as follow; I downloaded the report and put it into a pandas dataframe:

def downloadAdGroupReport(start_date, end_date):
    output = io.StringIO()

    # Initialize appropriate service.
    adwords_client = adwords.AdWordsClient.LoadFromStorage()

    report_downloader = adwords_client.GetReportDownloader(version='v201705')

    # Create report query.
    report_query = ('SELECT AdGroupId, AdGroupName, CampaignName, CpcBid, Week, Device, Clicks, AllConversions '
                      'FROM ADGROUP_PERFORMANCE_REPORT '
                      #'WHERE AdGroupStatus IN [ENABLED] '
                      'DURING '+start_date+','+end_date)

    # Write query result to output file
    report_downloader.DownloadReportWithAwql(
        report_query,
        'CSV',
        output,
        client_customer_id='XXX-XXX-XXXX', # denotes which adw account to pull from
        skip_report_header=True,
        skip_column_header=False,
        skip_report_summary=True,
        include_zero_impressions=False)


    output.seek(0)

    df = pd.read_csv(output)

    return df