Dynamic summarize

Hello,

A question that can either be really easy to answer or too difficult.

I have a database with Orders; Order numbers, product code, date, quantity sold and various other flags (country, product category, e.t.c ).  Obviously, one order can have one or multiple order lines (based on the different number of products sold).

I have created a summary table based on the individual order number. In this table, I have the number of lines and the total quantity sold per order.  In addition, I have created an output based on the different number of lines counting the number of orders (1 Line Orders are X, 2 Line Orders are Y, e.t.c.) 

As I understand that it can be difficult to be understood, I have shared an example of the database

https://www.dropbox.com/s/2715sk921l0iw3r/dynamic%20summarize.pbix?dl=0

Thanks for your time,

Tasos

My problem starts when I apply filters. Let's assume the order 123 has two lines (ProductA and ProductB).  Additionally, we have a slicer for the different product categories. When the end user selects the product category 1, product B is excluded. However, the graph, that in X-Axis uses values from the summary table above, still shoes that the order 123 has two lines.