How to count groups based on selection formula

I have a Group Selection formula that is working great:

Count ([vwTranJrnlChgs.Procedure_Code},{vwTranJrnlChgs.Patient_Number}) = 2

This is showing me only the patients who have had exactly 2 procedures and filtering out all other patients.

However, I would like to have a total count of these patients, and when I add a summary with a distinct count, the number is too large (probably including all other patients).

How can have an accurate count of these patients?

Thanks for any help!