Hi,
Yes that's fine. Your laptop recognises that it has two monitors.............it's in-built one and an external one. That will also be why you're seeing 2 video cards, though you should actually see 2 monitors, in you're display settings.
If your external monitor, and indeed your laptop, are working properly now, then there's no need to worry.
IS everything working ok?
Do you have the Manual? You should be able to make the external monitor your default single display, through a key combination, or using Windows Display Settings Advanced, or by using software that came with the ATI Radeon card.
But if everythings working ok for you, you may not wish to bother. Save for a new screen.
Here's a link to the Toshiba site, if you're missing the manual....
http://eu.computers.toshiba-europe.c...ad_manuals.jsp