I am using airflow on an EC2 instance using the `LocalScheduler` option. I've invoked `airflow scheduler` and `airflow webserver` and everything seems to be running fine. That said, after supplying the `cron` string to `schedule_interval` for "do this every 10 minutes," `'*/10 * * * *'`, the job continue to execute every 24 hours by default. Here's the header of the code: 

```
from datetime import datetime
import os
import sys

from airflow.models import DAG
from airflow.operators.python_operator import PythonOperator

import ds_dependencies

SCRIPT_PATH = os.getenv('PREPROC_PATH')

if SCRIPT_PATH:
    sys.path.insert(0, SCRIPT_PATH)
    import workers
else:
    print('Define PREPROC_PATH value in environmental variables')
    sys.exit(1)

default_args = {
  'start_date': datetime(2017, 9, 9, 10, 0, 0, 0), #..EC2 time. Equal to 11pm hora México
  'max_active_runs': 1,
  'concurrency': 4,
  'schedule_interval': '*/10 * * * *' #..every 10 minutes
}

DAG = DAG(
  dag_id='dash_update',
  default_args=default_args
)

...

```