That's weird. Uh... Try reinstalling frozen throne. It probably installed weird. Heres how to uninstall. I found it in the Support folder:
Uninstall Information
Warcraft III: The Frozen Throne is installed into a single folder on your hard drive, with the default name of "Warcraft III." When the game is first run, preferences files named "Warcraft III Preferences", "Battle.net Preferences" and "com.blizzard.Warcraft III.plist" may be created on your hard drive. We do not install any Extensions or Control Panels. To uninstall the game, use the following steps.
For Mac OS X:
From the "Go" menu in the menu bar, choose "Home."
Open "Library" folder.
Open "Preferences" folder.
Throw away the "Warcraft III Preferences" file, the "Battle.net Preferences" file, the "com.blizzard.Warcraft III" file and the "com.blizzard.Warcraft III.plist" file.
Find the Warcraft III folder on your hard drive, and open it.
If you intend to reinstall, back up any custom maps you have created in the Maps folder.
If you intend to reinstall, back up any saved games you have created in the Save folder.
Close the Warcraft III folder.
Move the Warcraft III folder to the trash.
Empty the trash.
Now just reinstall Frozen Throne.