[Lyle Swallows]

my "best guess" would be looking at the support gusset on the bottom leaves very little room on the nut side of the fastener so they had to give it such little edge distance. 9/16" would be the more appropriate edge distance. and whoever drill yours initially just mirrored both sides.

i dont think this would be an issue looking at the materials and the load doesnt have a great enough leverage in my opinion. i am not an engineer however, just a mechanic.