Artwork categories (Finished Projects, Blender Tests, etc…) everything is viewed as tiles.
If you give
no-tags as a tag the posts appear as lists (as anywhere in the forum). If you set
all-tags then posts appear as tiles (which is by default how galleries apear).
This could be a good way to switch views between list/tiles and for example to be able to see a review of how the posts appear.
This could be a bug, but also a feature.