After some time with ACL, you will start to get the feel for when certain jobs get posted within the posting dates.
I've always been under the impression that some of the less desirable jobs are posted first, since they have a filter that limits the amount of jobs that can be self-scheduled.
I have to say that the locations tab, relatively simple reports and self-scheduling makes ACL one of my favorite MSCs to shop for, despite the pay being between average and non-existent for most restaurants.
The ability to pick up a last-minute lunch or dinner from my phone when my GF and I are out on the town has come in handy many times.