Appended columns not shown in Report

Hello,

I have appended one table into another containing Unique key's, but when I want to show my Factstable in Report, two columns are not shown side by side. 

This is my scenario:

Factstable 1: 

KEY_Shop; KEY_Week; KEY_Product; Weekly_Sales

Table 2: Promotions

KEY_Shop; KEY_Week; KEY_Product; Promotion_ID

I have appended Table 2 into Factstable 1, and now I want to make measures in the Desktop. But when I want to show the Factstable with Promotion_ID next to Weekly_Sales, it shows them under each other, not next. 

I need to append these tables since otherwise they do not aggregate correctly later when I am exporting it to excel.

I have changed the value of Weekly_Sales to Decimal.

What do i need to do?

Kind regards