Matrix Visual don't show all the data

Hi Experts,

I have a list of employees with an individual performance rating. Example below. 

I want to share the data with the respective managers in a three dimensional way. For the first dimension Performance I use in a matrix the rows, for the 2nd dimension Behavior I use the columns and for the 3rd dimension Potential I use symbols (like arrows).

If more than one employee has the same rating in all dimesion (e.g. Charlize Theron and Sam Fox) the visula allows me to show only the first or the last dataset. Is it possible to tell the system to show me all dates and not just either the first or last record?

Thank you in advance for some ideas!