Why is this RANKX not working?

After some troubleshooting, I have found the solution. Let me explain:

I have a 2nd table with the sortOrder of the questions. In my main data, I have added the sortorder using the RELATED() function. I then sorted the Attribute text by the sortOrder.

This is what broke the RANKX. All I needed to do was to include the sortOrder in the RANKX function.

So this: 

RANKX(all('QA Data'[Attribute]),calculate(sum('QA Data'[Points])/sum('QA Data'[Max Points])),,DESC,dense)

Should be changed to this:

RANKX(all('QA Data'[Attribute],'QA Data'[sortAttribute]),calculate(sum('QA Data'[Points])/sum('QA Data'[Max Points])),,DESC,dense)

Or shorter, I could use the Pass Rate measure instead of the CALCULATE(SUM()/SUM())

RANKX(all('QA Data'[Attribute],'QA Data'[sortAttribute]),[(%) Pass Rate],,DESC,dense)