Instead of using bulleted lists, which I agree can be a pain to edit,
try using a table instead. Much more flexible for the sort of thing
you are wanting to do I think

I am also the secretary of a club and do the same sort of thing - except
that I use calc rather than writer. My main reason is so let me sort the
list into various different orders - but I also do it to avoid the very
sort of problems that you are describing.

Or could it be handled in a spreadsheet, but then if surrounding needed
text
it could be harder.

I agree an embedded table in the document would be easier, and if you needed
to add to it more rows, and columns can be added.

Sounds to me like you are dealing with a database so my suggestion is to
use Base, LebreOffice's database program?
There is a tutorial on Writer, Calc, Impress, Base, Draw and Math.
This is for Writer. The column on the right list the others.
gofree.com/Tutorials/LibreOfficeCreateEdit.php
This may not give you the answers you are looking for. Spending sometime
looking at these tutorials to see what each program does, then spending
time going through the tutorials of the ones you do use, will be time well
spent.
Like someone said, Writer is in over its head in maintaining a database.
Like me, not knowing what you don't know, we all go down that path
everyday.

Can you prepare it with the spreadsheet, then paste it to Libre Office when
done?

If you're thinking of going down that route, just embed the spreadsheet
directly in the document. Go to Insert > Object > OLE Object and select
the spreadsheet option. It can be a little tricky to get just right and
a table may be a better idea, though.

I can appreciate the problem reported by George. I do a lot of
writing and generally use Tables when dealing with Lists and
Groups. However, the Bullets and Indents keep on butting in
when I'm writing normal texts and using paragraphs.

I think I that had turned them off, then next paragraph
I get a new indent. Open Office did not behave like this.

I now have a cure although it has taken a bit of learning.
Am using Lyx for nearly all writing. Reports, letters, memoranda
are very easy and quick.

There is an option to disable the auto numbering/indenting/billeting in
ordered and disordered lists, I think, under tools > autocorrect >
options. Or else format > options > autocorrect. I'm not at my PC to
verify, and probably don't have a recent version, but it should be in one
of those places to do what you want.

Thank you, will have a look & see what can be found there.