I forgot about this question...
But good news is I found the answer and since there were 53 views in this question. I will post the answer.
I created a sub-report inside of the (red) list and placed the (blue)tablix in the subreport. I then grouped the row as I did with (pink) and added 2 parameters to the subreport, passing values(criteria) to it from the main report.
That allowed me to show detail on (blue)tablix.
Hope this helps anyone who is having this issue...