Condensing issues and staff allocation


I am having Condensing issues with staff allocation for my 4 x horns and 3 x trumpets.

I have taken screenshots of the various scenarios to show the issues.

Is there a setting I have overlooked? I have re-set all 4 horns to factory default but it still seems to be acting strangely.

And just for the record, I just looked at another movement in a separate project and the condensing mode is working beautifully well.

is better to make condensing groups such as : horn 1 and 2 / horn 3 and 4.
Otherwise you can always go for the manual condensing and set up the staves and voices as you desire. It takes a bit of time if you have a complicated scoring.