Displaying related records

Hello,

I have an application that uses relationship classes to display related records on the Results component.

I am not able to display the related tables in the order that I want, and I am wondering how they are managed?

I have tried:

- creating the relationship classes in the order I want (assuming index = left to right)

- Publishing the map service with the tables in the desired order
- Organizing the tables in Map Viewer under the same assumption

Are these tabs ordered arbitrarily by default and is there a way to control their order? After a few map refreshes, I also notice that the tabs can sometimes appear in a different order than the previous 

Thank you