Hi,
Thanks for using the Events Calendar.
Here on the pre-sales forum, I’m afraid we do not provide technical support. I would ask that you take any technical support questions across to our wordpress.org forum – our staff scan it periodically and other community members may also be able to help out.
The Events Calendar
However, I did take a look and you could review your time format settings here to look for duplicates there and let us know on WordPress.org what you find out:
Admin > Settings > General > Time Format
Events > Settings > Display Tab > “Date Format Settings”
Thanks again!