can you post some good pictures of this keyboard somewhere, and advise the links to them, such that we can see more clearly the blue characters you refer to.
I think this is the keyboard:-
If so, it is multimedia and to work correctly it must have a driver properly installed.
If the driver is not installed, would think some keys will not function or function incorrectly.
Also where exactly are you based? I am in Hammersmith, West London.
I ask, because am wondering if there is a language problem, as a keyboard is (generally) for a specific language character set, and the operating system needs to be set up for this, possibly also the monitor to display that language's character set correctly.
Good Luck - Keep us posted.