Here is what is happening. I'm using debian with KDE. I open Konsole. I use ssh to log into my amazon server. All of the following commands are done in the Konsole whiled logged into the amazon server. The screen I get when I log it I will call "original" screen:
I type screen and, as expected, I get a new detached screen
I log into mysql
Now I want to go to the "original". For this I would press Cntrl+a,d. However when I'm logged into mysql, it simply exits mysql (it logs me out) and does not send me back to the "original" screen.