Originally Posted by kaconga
I know I will need two gallons so I reset that part and the hops weren't just divided by five anymore.
Your preboil volume is double your intended postboil volume? When you set your volume to 2 gallons, it takes into account the gravity as well. Going from 1.2 to 2 gallons is a huge difference in terms of preboil gravity (if the target postboil volume is 1 gallon) and the lower your gravity is the greater hop utilization you will have = less hops for the same IBU.
Kinda why some breweries do 90 minute boils, a little more water and time probably offset the cost of needing more hops to achieve a particular IBU