Well, its a bug which was supposed to be fixed in version 3.20.1750
From enter link description here
v3.20.1750 (25 Jun 2012) - Improved accuracy for uninstall items installation date and size.
Try newer version.
Moreover, programs sometimes writes installation date to:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\
Look for you program there, find install date
, you can see you can change it and you will see difference in the control panel.