Particular members not changing line weight via level manager


I've just started using 3D modeling on AECOsim and using the "clip volume"  tool to produce elevations and section.

While most of the level colour and weight can be changed via the level manager but some members don't as show on the picture below:

I can changes its line weight  to the orange beam in the picture above in the cut back zone but  where it has been cut the member line weight has not be changed,

similar in the C purlins above.

I have a few questions:

Is this a default setting in the programme when some members are to keep there line weight when they are cut through? and can I change this setting? and if so can someone advice me on how to?