Have you enabled the portfolio type within jetpack settings?
Hi thanks for your reply.
I see as a workaround I have currently done the following (for any future readers of this forum post):
1) Set the Orvis homepage style to a normal template (not portfolio)
2) Used FooGallery plugin to create a tiled gallery on the homepage similar to Orvis
3) Created custom URL links to each gallery image to a page for each project.
This achieves the outcome I am looking for.