One big huge sky bridge

Yes, different settlements have different values.

You should open the console again, when you have the workbench of the desired settlement in sight, and click on it to select it (it will show it's id) then enter the console commands.
You probably still had the Starlight workbench selected so it gave you those numbers.

Since the settlement size limit is a graphical issue, it should not at all have been placed in game, it should only have been a setting in option-video next to vsync, resolution etc