Short cut keys nuisance


I'm using Windows 7 with Office 10 with Dual Monitors. Sometimes (not always) the 1 and 2 keystrokes (along with the ! and @ keystrokes) act as shortcut keys to move my active window to the other monitor depending on which one I am currently on. The 1 and ! move to the left monitor and the 2 and @ move to the right monitor. How can I make this stop???