I just noticed, a few days ago, that On the Fasttrack does Sundays now. Somehow I hadn't noticed sooner. So then I had to go back and get all the old Sundays (to 2010-11-14) and save them to my archive. And now I still need to update my downloading script to stop skipping Sundays.
In the process of geting them, I found out that the naming scheme on the site has changed a few times. I guess I just forgot updating my script previously, to account for that.
And now I need to look and see if the Sunday comic appears in the newspaper.