Cpustress - incorrect detection of cpus and keyboard problem

In UBCD 5.2.0 and 5.2.1 cpustress does not correctly detect the number of cpus. I tested it on a desktop Intel Core 2 Quad Q9650 (4 cores, 4 threads) and a notebook Intel Core i5-3210M (2 cores, 4 threads) and it both cases it detects only 1 cpu and runs only 1 instance of the mersenne prime test.

Also, on the desktop system the keyboard works in the UBCD menus but stops working as soon as I start cpustress. The keyboard is a Microsoft Natural Keyboard Pro connected with USB. On the notebook the keyboard worked normally.