The way that I read this is
Person Weight Capacity: 2 people with a combined weight of 180lbs ( ie 1 adult and one small child, or really just one adult)
Maximum Weight Capacity: Including people, gear, motor, beverages etc. of 275lbs.
These small 10' jon boats seem to be only really meant for one person, and maybe their dog.
The next size up boat in that line jumps up to a Maximum Person Weight of 295lb which is more of an actual 2 person boat. (granted these would be 2 smaller people)