Average number of appointments - incorrect calculation

I created this Crosstab report which uses a formula to calculate the average number of appointments scheduled per day.  A couple of rows seem correct, but others are not.  (I have attached a jpg of the report)

Any help would be appreciated!

Here is the formula (which I received from Abhilash from a discussion a few weeks ago):

9)
Next, Right-click one of the zero value cells in the newly added column >
Calculated Member > Edit Calculation Formula and use this code:

local numbervar i;   

local numbervar avg;   

local numbervar cnt;  

for i := 0 to CurrentColumnIndex-1 do   

(   

    avg := avg + (GridValueAt(CurrentRowIndex, i,
CurrentSummaryIndex);   

    cnt := cnt + 1;   

);   

avg/cnt;

Message was edited by: C Warner (Initially thought only first 2 rows were wrong, but other rows are wrong as well)