Hi
There is an issue in 11.30 that causes the "Accelerated" logo to be displayed instead of the "VPS Optimized" logo. This is only an issue with the logo. There is nothing wrong with cPanel on your server. The correct software for your VPS is installed.
This will be resolved in internal case 50075. An announcement will be made on our changelog,
http://go.cpanel.net/changelog , when this is done. Until then, you can disregard the different logo. It is only a difference in the logo, and does not mean anything is wrong on your server.