Where did all the water go??? Breville Precision Pro to Fellow Aiden

For two years I've brewed my morning batch with a Breville Precision Pro... 40oz each morning... That's 6 cups right?

I'd heard the Fellow Aiden uses a bit more water in the grounds, so I increased it to 6.5 cups and it recommended about the same 65grams of coffee as I'd been using.

However, the output was shockingly lower short over 2 full cups... What the heck? I could tell by the water chamber that it had used precisely 6.5 cups and surely there was not more the 2 cups saturated in the grinds???

So I went back to my Breville to make sure I wasn't crazy.. Sure enough... 40 oz or 8 cups is what I'd been doing every day... Uh, wait?? 8 cups? 8 cups is not 40oz and vice versa... Is the scale on the Breville wrong? Very confused.

Regardless - 8 cups on the Aiden is not going to get my to my typical 40 oz of in the pot output... and it's calling for way more grinds than 65 grams....