When using desktop spaces, new windows force me to "desktop 1"
I am having two issues when using desktop spaces, and am hoping for a little assisstance. 2011 iMac running Mac OS X Mountain Lion 10.8.2.
1. When an application has a pop-up / new window (not always a web browser, but this is included), the window will open in desktop 2 (or whichever I am using), but then the OS will switch to desktop 1 immediately. When I attempt to return to desktop 2, it won't stay open, but will rather return to desktop 1. To remedy this, I have to open mission control, drag the desired window to desktop 1, assume desktop 1, then drag the window bag to desktop 2, where it will allow me to stay. Sounds crazy, I know.
2. When on desktop 2, and opening a new application (i.e. iTunes) it will open on desktop 1 (and take me there), despite me wanting it to open on the desktop where I am working. I am then able to drag the new application wherever I want to work on it.
Thanks in advance for your help.
iMac, OS X Mountain Lion (10.8.2)