The current day's stop point doesn't end at the chapter boundary (previous page), but ends 1-2 paragraphs in to the next chapter/page.

The next day's start point starts at the chapter/page's boundary, so you end up rereading the first paragraph or two.

This is not specific to this resource; I've seen it happen with a number of custom reading plans for other books.
I've also included a screenshot of the reading plan, showing some peculiar page overlap. For example, yesterday's reading was pages 24-31, while today's was pages 30-36.

Logos 7.3 SR-1 7.3.0.0041 on macOS 10.12.2. (This is not new to 7.3 SR-1, but was also was present in 7.2 for certain.)