I guess you missed the email,
http://www.jlab.org/~adaq/halog/html/1102_archive/110211205227.html
this was to check the timing of the gate with respect to a physical signal.
It is useful to check this when timing is changed to see how far the gate is from the signal. Though it seems no one is looking at it right now so if timing is ok and you don't need the check you can remove the split.