Breath mark position wrong in extracted parts

Thanks for a great program! It's really useful.

I'm a new user so I may not be doing this quite right, but I think that there is a small problem with breath marks:
I am writing a score for four recorders and then extracting the parts. The attached files breath and breath S show a few bars of the score and the extracted soprano recorder part. In the first bar of the score there is a breath mark after the first note. I have moved this from its default position so that it lines up properly with the rest of the score. When I extract the soprano part, the breath mark appears after the second note instead of the first. In fact even though the bar is shorter in the extracted part, the distance between the note and the breath mark is actually longer.
I do wonder whether the earlier scheme of having breath marks attached to the following note would work better, at least in most cases? After all the start of a note is at a well-defined position whereas the end isn't, really.
I did also try attaching the breath to the following note and moving it before the note, but this didn't quite work either:
breathbefore and breathbefore S show the results.

Thanks for any help

Anthony