I have this section in a piano piece. On playback the highlighted section repeats and plays twice. I am flummoxed as to why and I have no conception of what I would do to fix this. Why on earth would Dorico do this? Has this ever happened to anybody before? There have never been repeat bars here that were deleted or anything like that.
Can you share just that section of your project file that includes what you display here?
Is it possible that you inadvertently enabled the Loop/Cycle function? I’ve not used it, but it is there. Possibly an unintended series of keystrokes set it in motion?
It’s using Pianoteq. Wouldn’t I have to post the Pianoteq app as well? That’s obviously not possible. What to do?
Also, Dorico does not play from the selected position when I hit P but keeps going from where it was up to. and, suddenly the volume levels are low. One could say I am going completely spare!
Many of us also have Pianoteq. Happy to take a look.
Here we are. This is the complete score of an unfinished work for piano (not for public distribution). The issue of the duplicated audio fragment occur in the bottom of page 8, where the yellow highlighted phrase shown above repeats before it is due to play. It seems this is the only part of the score that shows this strange behaviour. Even if II delete the phrase it still plays! How can that be?
Using Dorico 6.2.30, Pianoteq 9.2.1 (the latest version), Windows 11 Pro, Universal Audio Volt 4 audio interface.
FWIW, Soli font, and Limux Biolinum 0 (just saying!).
I can’t find any reason for this. I’d be grateful if my learned colleagues here can.
For some reason my NotePerformer installation seems to have gone astray and I was not able to swap out Pianoteq for NotePerformer to test.
Changing the piano model in Pianoteq makes no difference.
If this is a bug, it’s certainly unique in history. 
fff.dorico (2.6 MB)
Show all signposts.
Select the signpost “+ 1 staff, - 1 staff” at the top of page 8 and delete it.
The rising figure halfway through the bar before N1 also occurs a few beats earlier in the extra staff.
To delete the unwanted notes with minimal risk of potential damage to the rest of the piece:
Show all signposts.
Select the signpost “+ 1 staff, - 1 staff” at the top of page 8 and use Edit > Cut (instead of Delete).
Select and delete the notes you don’t want.
Select the point where the signpost was cut from (top left of page 8) and Edit > Paste.
Yes I now find that is the issue. But having trouble deleting without messing up all the following score.
After the unwanted notes have been removed, pasting the signpost back to its original location should restore the rest of the score to how it was originally.
An alternative method (which I have not tested because of my almost non-existent use of Play mode) is to see if you can find those notes there and delete them. In theory the layout of the score should not be affected, as this approach only touches the content, not the appearance.
I find the Key Editor utterly impossible to use.
Here is an edited version using the method I described, ie Cut for the signpost, deleting the four unwanted notes and any leftover tuplet brackets, then using Paste to restore the signpost.
After a visual inspection comparing the original to the edited version, the only layout change I could observe was on page 24, where the spacing between the two systems had changed from 59.3mm to 14.5mm. In Engrave mode > Staff Spacing, I restored that value (59.3mm) in the edited version and then did another visual comparison. I could not see any differences.
The comparison method which I used is one which is used by art fraud forensic detectives, namely having both documents open with the same view parameters (height, width, side panels open/closed, zoom level, etc.), and then switching back and forth between them. Having Playback de-activated for both documents made sure that the switch took very little time.
fff (ed).dorico (2.7 MB)
@StevenJones01 Heartfelt thanks for your solution. Still took my dumb brain an hour to understand iit, but I finally did it according to your instructions and all is well. Phew. That was the hardest Dorico issue I have ever had.
Thanks for making an edit but I wanted to try to fix it myself so Ii understand it properly.
Your generosity is much appreciated.