Urgent - Events+ times incorrect.

Hi Guys,
The site owner sent out an invite to 600 people today and we now see that the times in the Add New Event are different than in the actual front end.
For example and event showing 11:30 in the edit event in the back or front end editor show 5AM in the actual event archive.
I am using the short code because the plugin templates do not match the theme well.
I did test by turning off all plugins and switching themes and the same result still purists.

All help is appreciated.