Spaces in Mavericks: apps do not remember their space

I've switched to Mavericks and i wonder if the behaviour i'm seeing is a bug or a "feature".

It used to be that whenever you created spaces you could assign apps to a specific space, say Mail.app to space #2. In 10.8 that functionality was lost, but apps seem to 'remember' the space they were closed in. So if i opened Mail.app, dragged it to space #2, switched back to space #1 and open Mail.app again it would still open in space #2.

Unfortunately this seems to be broken in Mavericks. If i try the same thing the app simply opens in the space where i'm currently in, so i need to drag the app to the correct space again. Very frustrating.

Does anyone know a solution to this problem or should i try to file it as a bug with Apple?

Since Lion you assign app to a Desktop/space from the dock.

Doing this, app will open in the designated space regardless of the space you actually are.

I had the same problem and I think I solved it.

Within System Preferences goto Mission Control uncheck "Automatically rearrange Spaces based on their recent use"