This may be self-evident to many, but I don’t understand why the cue labels appear over the staff to which they apply (the oboe cues are for Clarinets 1 and 2):
rather than on the staff (and without the line on the left):
If I apply a cue to say Clarinet 2 first, it is awkward to assign it to Clarinet 1 because the label for Clarinet 2 is covering it. I also second guess which label applies to which instrument.
All signposts use the same design: an opaque highlighted rectangle with information inside, positioned a bit above the staff, with a “flagpole” connecting it to the staff to which it applies, or the top of the system in the case of system-relevant signposts (like frame breaks).
The reason for this is that where signposts are above staves with musical content, being slightly above the staff means the signpost content overlays the music less.
If this score were more widely spaced, the text wouldn’t overlay the staff above. So it’s a coincidence here that the visual effect is as you describe.
Thank you, @Lillie_Harris I understand the decision, but in my opinion I find this design choice unfortunate, since the staves of an orchestral score are not usually far apart and the places where cues go are most often empty of content.
To make it easier to spot cues, you can highlight them in the View menu.
(Edit: Sorry, it seems that “highlight cues” only applies if the cue notes are actually visible.)
I believe you can easily toggle the signpost off and then back on with a simple command key or from the jump bar. They are useful for understanding what is going on behind the scenes in the dorico file and do not print as part of the score.
On the other hand, it might be a little useful to some if we had a little bit of control in the default placement of signposts. In the screenshots provided, one may regard them as attached to the staff above at a quick glance. 
— Jim
