There are a lot of posts in Bug Report forum about the EXP bug.The bug happens because the game is set for a "." as the decimal separator. As mainland Europe uses "," as the decimal separator, the game gets confused and only displays characters before the ",".
To get round this, you need to change your Windows regional settings to use a "." as the decimal separator. As this would effect all your PC stuff, not just Mir, you might prefer to just live without the decimals.
You spell Wizard with 1 z ! 
