How to solve problem with tie/slur?

I want to write a steady/sustained tremolo note for the strings and make clear where exactly to change the dynamics. In order to achieve that I split the sustained notes “optically”, attaching the dynamics and then want to slur or tie them together so the player knows where exactly to play which dynamic. Here a screenshot how far I got:
When I now try to tie the two notes, dorico combines them, substituting the two half notes by a whole note. When I instead try to slur both parts in order to get rid of the gap, then dorico starts the slur from the very beginning of the first note (in the previous bar) , which is not what I want see here neither … any advice how to solve this problem is welcome …

Before pressing T, press O for Force Duration. That will preserve the half notes.


Thank you! That works.