[O] (1) global cycling for numbered lists? (2) adaptive links to list item numbers?

[Ulva]

Hello again,

Two more questions:

(1) S-Tab is very handy to collapse list sublevels globally, but it only
seems to work if the first level of the list is 'bulleted' (*), not if it
consists of numbers. Is this correct, and is there a way around it?

(2) Taking a cue from Insert>Cross-Reference in LibreOffice, suppose I would
like to refer in section (say) 4.1.1 to section 2.1. Something like "As
mentioned in 2.1, frogs are often green". But I would like this "2.1"
reference to update automatically if later the 2.1 content ends up somewhere
else in the document. E.g. if a first-level section is added at the top of
the list and everything else shifts, 4.1.1 becomes 5.1.1 and should update
to "As mentioned in 3.1, frogs are often green". Is this possible in
emacs/org-mode?

Thanks!

PS: /Are/ frogs in fact often green? What are the stats? ;-)