What I've figured out is the Leo Vince seem to hang down lower at the front of the muffler body compared to stock mufflers (see first link versus second link): the Leo Vince use a mid-pipe that they come with rather than using flange mounts to the original mid pipe...I wonder if that has something to do with it. Unless anyone has any ideas, I'm either going to find someone who can modify my Jesse racks to clear the muffler corners, replace my mufflers with another brand or modify my Leo Bince mid pipe so they tuck in closer to the middle-line of the bike.
In these links, note that the OEM mufflers do not drop below that bottom corner of the side bosy panel. The Leo Vince seem to mount much lower; the exact area where the lower oval loop of the Jesse rack tucks in under the side body panel.
Stock OEM mufflers:
Leo Vince mufflers: