Sync does not sync record numbers

I’m brand new to EndNote - have used RefMan for more than 20 years.

Isn’t the correct solution that the so-called sync actually sync properly? !

curiously, i set up a new library on one computer and synched it to  my Endnote account.  Then i created a ‘new’ library on another of my computers and synched (sic) this

none of the record numbers is the same as in the original ‘new’ library (which had not been touched in the interim)

I’m loathe to go further with EndNote and not be able to do create proper reference lists on different computers, which was a major reason why I even contemplated switching away from RefMan.