Spawning to many background SBT processes

Hi,

I downloaded Intellij 13 EAP yesterday and installed Scala plugin         0.26.314.

I imported an existing SBT project and it works fine. However, whenever I change something in the project configuration a new background process is started that rebuilds the project.

The frequency of spawning new processes seems to be high. It's enough to change a version of one of the dependencies a few times in a row and after few seconds you end up with 6 (or more) SBT processes that take ages to finish.

Any thoughts on this?

Thanks,
Daniel