I guess there are two ways of thinking about a file trigger. If you dump 10 files in a monitored folder, you could have two ways of solving it:
1) The trigger is fired once, and contains a list of 10 files
2) The trigger is fired 10 times, each of the containing one file.
VisualCron uses the second method, and for good reason i think. If there is a tiny lag between the time files are dumped into the folder, method 1 is going to get messy very quickly.
To me it makes sense with variable name LastTrigger. If that is what you meant :)