Thank you very much. I appreciate the help!

I've re-added the area in my latest changeset. I've left the Big Sandhills out of the multipolygon, which consequently renders it as a wooded area on the map. You're more than welcome to have a go at it. Could be a good learning experience for me.

Hi, thank you. I made a few attempts to solve it initially, but I'm having trouble getting something that works, mainly due to the coastline cutting the wooded area in two. I've just removed the area for now as it was initially just an early draft, but I'll look into how to properly handle such cases.

I can confirm the building removed was actually demolished

Appears to be an accidental typo on the Mitchelton to Ferny Grove relation. "Grov" instead of "Grove".

Wiki says layer 0 should generally not be used, which I must've missed. I'm going to revert the changes as they didn't resolve the issue regardless.