[PHP] API returning different results then the web interface on account performance report

Hi, 

I'm using the API to get an account performance report

here is part of my php code

<?php

$this->user->LoadService('ReportDefinitionService', 'v201605');

$this->user->SetClientCustomerId($account->customerId);

$selector         = new \Selector();

$selector->fields = [

'Cost',

'Impressions',

'Ctr',

'Clicks',

'AverageCpc',

'AllConversions',

'CostPerConversion',

'AllConversionRate',

];

$reportDefinition = new \ReportDefinition();

$reportDefinition->selector       = $selector;

$reportDefinition->reportName     = 'foo_bar_'.time();

$reportDefinition->dateRangeType  = 'THIS_MONTH';

$reportDefinition->reportType     = 'ACCOUNT_PERFORMANCE_REPORT';

$reportDefinition->downloadFormat = 'XML';

$options = [

'returnMoneyInMicros' => true,

'skipReportHeader'    => true,

'skipReportSummary'   => true,

];

$data = \ReportUtils::DownloadReport($reportDefinition, null, $this->user, $options);

the API returns 0 for AllConv and 191 for clicks

But in the web GUI it shows 9 for AllConv and 279 for clicks

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