Looking for someone with a cmp-03 composter. Need help.?

I bought a used cmp-03 composter. It has several small holes for aeration but also has a couple of holes abt 1-1/2 inches in diameter. When I roll it the compost material comes out. Are there supposed to be plugs or something in those holes that are missing? I am new to composting so not sure if those holes are there for a reason. Help.