This location is so disorganized. Nothing says where to line up. Sometimes people form a single line for all checkouts, sometimes they go right to a checkout that *seems* active. I say it may only seem active because the staff randomly walks away from a place they've been taking orders to a location that was unused, leaving customers milling around and confused. Usually you have a mix of single liners and straight to cashers and everyone is frustrated.
A few signs and a competent supervisor here would do a world of good.