sample editor & project window minimise & maximise

I have an issue that the sample editor and project window minimise and maximise buttons seem to control the sizing of the windows of each other when I thought they should be independent. I can’t also open more than two sample editors at once.

I’m sure that I am doing something wrong but could this be clarified, eg is it something to do with always on top?

See:

https://vimeo.com/75090016

Rule number one in Cubase is never EVER use the maximize button! If you want a particular window “maximized” just pull the edges all the way out till it’s essentially full screen. You just have to do this once for each window and Cubase will remember the way you set it up.

Thanks