>> Because you have multiple monitors that can attach to that card <<
I have the same problem, but only one monitor has ever been connected to the card.
There are three "extended destop" entries in addition to the primary entry when you right click on the ccc tray icon.
There are different 10 configuration entries under the key;
and that number has grown from (I think) 3 since I purchased the computer in December
Related to this there are multiple little irritants such as open windows being resized and move to the top left of the monitor when coming out of suspend.
Primary question; Can I delete all of the entries (except the last one which is "simulated") and restart the process?
amd driver version 18.104.22.168 (I am reluctant to update driver until I get this and other questions answered)
Thanks in advance,
addendum... how does one start a new topic? (found it!)