I just found out that if I try to grab an assignment on their website that gives a window of 8/16-8/20, but when I actually try to get it, it shows me only 8/19 on.....I then went to their app on my phone and it gave the complete window of 8/16-8/20 dates to choose from.
Oh, oh, oh, thanks for letting me know. I wondered about this and have not taken a few because of this weird date frame thing! Going to give it a try now.