Question: I'm having an issue with Unique Events and Total events. I don't really understand why unique events are greater than total events (image attached: <https://analytics-a-googleproductforums-com.googlegroups.com/attach/584c3c65bd24cfec/Screenshot%20at%202013-05-14%2017:00:40.png?gda=9qkpgUYAAADqfLbDOUx1KZ9vP-6pB8mH0QevsNJBCwpb2zqmxh9R_FqJw8mf6kYUxitGhb4bDE5x40jamwa1UURqDcgHarKEE-Ea7GxYMt0t6nY0uV5FIQ&view=1&part=4>). 

Someone can explain how this is posible?

Santiago Vázquez

Answer: 
If you have a segment applied it's probably sampling. You can confirm or deny sampling is the cause by seeing if there is a yellow background note above the graph but below the date selection on the report page. There is also a grid of filled in and not filled in circles next to the new scholar cap (also below the date selection) sometimes.
Total Events are calculated as the total number of interactions with a tracked web page object. On the other hand, where a single user session (or visit) has one or more events, this is calculated as a single Visit w/Event, or Unique Event in the reports. For example, if one user clicks the same button on a video 5 times, the total number of events associated with the video is 5, and the number of unique events is 1.