RateExceededError rate limiter is broken

It says to wait 30s. I waited 31s. It still complains. It's single-threaded. 

2015-12-09 18:11:42.944083+00:00 heroku scheduler.5645 - - Starting process with command `php yii kw/stats` Context

2015-12-09 18:11:48.820233+00:00 app scheduler.5645 - - Warning: [RateExceededError <rateName=RATE_LIMIT, rateKey=null, rateScope=ACCOUNT, retryAfterSeconds=30>] Context

2015-12-09 18:11:48.820719+00:00 app scheduler.5645 - - Sleeping 30 seconds. Context

2015-12-09 18:11:43.582785+00:00 heroku scheduler.5645 - - State changed from starting to up Context

2015-12-09 18:12:19.973304+00:00 app scheduler.5645 - - Error: Giving up. [RateExceededError <rateName=RATE_LIMIT, rateKey=null, rateScope=ACCOUNT, retryAfterSeconds=30>] Exception Context

2015-12-09 18:12:20.841574+00:00 heroku scheduler.5645 - - Process exited with status 0 Context

2015-12-09 18:12:20.857147+00:00 heroku scheduler.5645 - - State changed from up to complete Context

Code

      // Make the get request.

      try {

        $retry = false;

        $page = $targetingIdeaService->get($selector);

      } catch (\SoapFault $e) { 

        Yii::error($e->getMessage());

        echo ("Warning: ".$e->getMessage().PHP_EOL);

        $errors = \ErrorUtils::GetApiErrors($e);

        foreach ($errors as $err) {

          if ($err->ApiErrorType == 'RateExceededError' && $err->retryAfterSeconds < 60) {

            echo "Sleeping $err->retryAfterSeconds seconds.\n";

            sleep($err->retryAfterSeconds+1);

            $retry = true;

          }

        }         

        if ($retry) {

          try {

            $page = $targetingIdeaService->get($selector);

          } catch (\SoapFault $e) {

            Yii::error($e->getMessage());

            echo "Error: Giving up. ".$e->getMessage().PHP_EOL;

            exit;

          }

        }

        else {

          echo "Error: Giving up.\n";

          exit;

        }

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