I have noticed an issue in the change calendar:

 

I navigated to the change calendar, then selected "Week" to view this week.  I then changed the filter to "All Changes" and the view moved forward by one month.  I changed the view again, and it again moved forward by a month.  I'm guessing this is a problem because it is close to the end of the month, and the system is selecting the wrong time frame to view.