2 Problems after upgrade to 11.10

[Paul Stear]

Hi all,
I have carried out a new install of 11.10 and have a few problems:-
1.	Every program starts to the task bar and is not displayed on the desktop.  
If I right click on the task bar entry, select advanced and then click keep 
above others, the program is displayed on the desktop. --- weird eh!
2.	The set-up didn't detect my second screen so only one screen is working.  
When I check system settings it thinks I only have one screen.  What do I need 
to do to to set up 2 screens?

Thanks for any help
Paul