ZBrushCentral

Trim curve only slicing ?

Hi all - I am firly new to Zbrush and have, what is probably a very nooby question:

I have a dynameshed cube and I used the trim curve to cut half of it away and get an expected result - nothing strange. However, when I use the same tool on the same cube, I go to only cut a corner off and nothing dissapears or gets cut away, only a new polygroup appears and the loading process that occurs when I tell it to trim the corner says “slicing” not “trimming”… why would this be? Am I doing something wrong?

Thanks in advance all,
Ross

Same thing is happening to me WTF :frowning:

EDIT: I fixed it increasing Zintensity