This is probably due to the fact that SpeedUpMyPC is not being closed properly.
After performing the scan and optimizing, please exit SpeedUpMyPC by clicking on the 'X' button at the top right corner of the window, and then right clicking on its icon in the system tray (next to the system clock) and choosing Exit. Next time you restart SpeedUpMyPC you should see the correct Optimization Level.
Further to the above please note that this issue was fixed in version 3.53.5.2325. If you upgrade to a later version, you do not need to carry out the above procedure every time you perform an optimization.
In order to upgrade to the latest build, please uninstall your current SpeedUpMyPC, making sure it is NOT running in the system tray (near the Windows clock). To uninstall, open Control Panel, go to Add or Remove Programs, select Uniblue SpeedUpMyPC and click on "Remove".
You can download the latest release from:
http://download.uniblue.com/ub/main/sp/speedupmypc3.exe
