1) I guess "Strg" is the german word/key for the Ctrl or Control-key.
Anyhow, it does not work in the forum browser for me and unless Microsoft Explorer can be called exotic, I do not use an exotic browser.
2) It sounds very weired what you said.
Try marking your text and choosing the {BOLD} icon.
You will see that it will choose and bold only it.
In case something is different, at least (they need to) add icons that will just put the appropriate marks for start-quoting and end-quoting and the user will fill the quoting content afterwards.