Hi,
When editing an existing dynamic via the popover - for example if I double click a ‘mf’ and change it to ‘mf<’ - many times what happens is that Dorico will add the new dynamic marking(s) to the score while also leaving the old one in place, so you would now have the old ‘mf’ under the new ‘mf<’. Then of course you have to delete the old one manually.
I’m guessing this is not a feature, as I can’t think of any situation where this would be needed, especially not by default… or am I not using the popover properly in some way?