No, they can’t be at precisely the same position, but they can be very close, e.g. if you set the caret to a very small resolution and add a dynamic e.g. 1/64th later than the previous one, it can then be nudged into the right spot in Engrave mode.
Thank you. That’ll completely solve this situation.
(A 32nd was enough for this – is a resolution of a 64th actually possible?)
In Play mode, we can change velocities. This would also be a possibility to let Dorico play various dynamics. Of course, we should arrange the position of the dynamic mark manually.