It seems the ‘reset centered beam’ doesn’t work ? I can’t find the ‘remove centered beam’ mentioned here:
I would prefer the beam position in the first beat. I can move the beam in engraver mode, but I haven’t been able to find a way to fix the stems.
Thanks for any help!
Try selecting the beam and hitting F (possibly a couple of times).
These aren’t strictly centered beams, rather you’ve crossed some notes to the other staff. Try selecting all the notes in those beams and forcing their stems upwards. (Ah yes I see that F will get you there too, of course - worth understanding the underlying commands/logic perhaps though)
I got as far as typing “that’s not a centered beam”, and then I looked at the documentation (Centered beams)
I’m a bit confused:
Well a forced centered beam and a cross-staff beam that is automatically centered between staves are different things in terms of edits made/active overrides but yes that could probably do with review.
Thank you, Leo - as usual, that worked perfectly!
Is there a command to improve the spacing of the cross-staff notes? Sorry if this has been discussed previously.
What I don’t like about this optical spacing is that it is general.I would like to have a granular solution at some point 
You are your own granular setting.
