I've answered my own post...I didn't correct the Brix figure. As you were..

I'm confused. I brewed a batch of Mosaic Smash,with US-05 should have been 5%. I hit all my numbers on brew day, but didn't take an FG reading as I left it 2 weeks and it had definitely finished. The beer is very dry, which I thought was just US-05 and maybe a low mash temp. I took a reading...