As a classical guitarist I’m well used to using 2 or 3 voices on one stave.
I also realise that if you have two different note lengths in one voice, the longer note will get broken and tied so that both notes share a common length and the longer note extends on further.
Here’s what I mean…
If I touch either note, Dorico correctly shows the length of that note.
If I touch the quaver B and then touch in the left panel, or hit “6”, it turns into a crotchet as I’d expect.
But the G turns into a quaver. Er ???. If I then turn the G back into a crotchet, the B becomes a quaver.
I can work round it, but am I missing something here?