Paulo, I've checked your trigger file and found the reason why you saw the strange date in the trigger log.
When you tick the box "Log trigger expressions" in "Betting Options", the program records the value of every trigger expression it encounters.
It considers each value box in a trigger condition a potential trigger expression, so it records its value into the trigger log file.
The date/time value you see in your log is taken from the invisible box in the first trigger condition:
Global Current Time is greater than 03/01/2014 23:59
If you change "is greater than" to "is between" in this condition, you will see the second field which contains that date and time, 15/12/2013 05:12:02 PM. It must have remained there from the previous version of your trigger when you were doing some tests.
Anyway, the point is, this value does not affect the program's logic in any way - it is just a value that gets written into the log file. It is not a bug, it is just a piece of information you don't need as you don't use that second value box in the trigger condition.