WebStorm autosaves SCSS-files instantly

Hi.  I have WebStorm 6.0 build #WS-127.68 on a Win7 machine. The problem is that it autosaves the edited file immediately after each keypress. The delay is no more than one second. The problem is made worse because I have a SCSS file watcher. After each keypress I get the Executing 'SCSS' task -message. And as it tries to compile SCSS into CSS in the middle of the editing the error console also opens complaining about invalid SCSS code.

In settings I have set "Save files automatically if application is idle for 600 s". How do I solve this problem?  IB