Thanks for the file, I could understand what your problem is.
The events you defined in this file are extended events with a 1s duration. In this case, the option "Epoch time" is ignored, and all the event is imported.
If you want to import longer epochs, you need to either create simple events instead (with no explicit duration), or convert the existing extended events to simple events with the process "Events > Convert to simple events" (it can be called directly from the Record tab, in the Events menu).