Adding staccato dots by double-clicking or shortcut - a bug
(1) In linked treble staff/Tab, adding a staccato dot by double-clicking from the articulations and ornaments palette creates a staccato dot in both staff AND TAB line; BUT, if you try to enter the same staccato dot using the shortcut Shift +S, the dot only appears in the treble staff.
(2) If you add the staccato dot by double clicking from the palette then the "cursor focus" immediately switches from the recipient note to the newly-added dot. But if you use the shift + S shortcut, the "cursor focus" stays on the note.
So, in short, the shortcuts must behave in the same way as double-clicking the dot in the palette: the dot must be applied to both treble staff AND linked TAB line, AND the "focus" must switch to the dot.
NB: This problem also applies to other symbols in the same palette.
PS: Edited to make the text clearer.