Chords spanning staffs

In order to have grace notes that roll a chord played by both hands and have the grace notes in the proper order and connected by same bar requires that I have the chord generated in one staff and then move selected notes to the other staff similar to what Ctrl-Shift-Up arrow does for the whole chord.
If I generate the chord as seperate chords in both staffs, I cannot generate the proper grace note sequence and cannot join the bars of the two chords into one bar. In fact the chord in the upper staff (right hand) the grace note order is reversed from what I need. It puts the upper note grace note first and the lower note's grace note second. The chord should roll from the low note to the high note which is the normal directing for rolling chords.
Maybe having a Ctrl-alt-up arrow (or down arrow) move selected notes to the other staff would solve the limitation.
Wonderful program otherwise.
Maybe there is a way of doing what I want already but I cannot find it.

Alex