sounds like you have two screens connected - your monitor and your tv. sounds like the type of secondary monitor display setting you're using is "extend" which just adds more real estate to your desktop. you would want to use "duplicate" provided your monitor and the tv are the same resolution. otherwise, just drag the windows you want on the tv over to the display by dragging off the screen either left or right (depending on how you have your multimonitor setup)
https
/support.microsoft.com/en-us/kb/976064