During the PBS bid award process, a swap involving a rotation that contains any duty period, or portion thereof, that is within the last six days of the current bid period will not be granted.

Why does swapping a trip that operates from the 22nd to the 26th for another trip operating the same days need to not be granted during the bid award process? It will have absolutely no effect on the next months bid. Dumb.

I get a trip that goes into the transition period, but why one that operates the 22nd to 26th?