Posted 3 August 2017, 3:58 pm ESTHi,
I have an issue in an exisiting project, and I created a brand new project based off the Northwind database to show the issue. I can send it to you but it is too large to attach it. The sample database is just a web application with a silverlight project attached with a pivotview in it attached to the Northwind Database. Nothing else it added.
When you initially go to set the color of the text based off another value, the legend appears but in reverse. If you look at ImageNW1.png and ImageNW2.png you will see the issue of the Blue and Green being in the wrong order. As soon as I edit the colors it fixes itself. If I apply just a very simple theme it also fixes itself so it looks like it might be an issue with the built in theme.
If you want me to send you the sample project let me know where to send it (it is about 7mb because of the dll's)