If your results are not showing recorded times as expected (i.e. 2pm instead of 4pm), check your Time Zone setting under Account Settings > User Settings > Change Time Zone and make sure the Time Zone is set to EST instead of MST.
How to Change Time Zone
Review detailed instructions
If the above does not work, you have have a survey with the report locale setting changed. Double check the Report settings for a given survey under Reports > Reports > File > Settings > Locale