I read some where ... not sure if it was here or the UG for DL, but gates 13 and 20 have a tree/planter/something in front of them so the lines are usually shorter at those two lines because poeple get in 12, 14, 19, or 21 when they veer around whatever is there. I meant to check it out when I was there last, but I forgot. I'll try to remember when I go in a couple of weeks..