I noticed this too. Before I found out about the master schedule function, I’d made my own version by asking the “playing next” widget to run a long list of 100-or-so items (this had the same effect of generating a schedule).
Sunday’s shows appeared in the list twice (eg: Sat – Sun – Sun – Mon etc)
Now, with the transition into Sunday, Monday’s shows are labelled in this list as “Tuesday” and so on. Something very odd going on, then, with how days are counted and the transition from Sunday to Monday.
https://www.paulradio.biz/paris/wp-content/uploads/2014/06/sched2.png