I suppose you have 3 Control-M servers.
Because your MaxOldTotal = 32, having 3 CTM servers will give you max 11 days of history.
Putting this value to 48 (+ little margin for restarted Control-M servers), will give you 16 days of history.
The problem has been solved. I contacted the BMC support and they told me that there was an issue with the EM Fix Pack 1(something wrong when displaying the history days), and installing the Fix Pack 2 will fix this issue. I have installed the FP 2 and everything is working fine now. Thanks for the help.