We are staying ar POR for our next trip!

Our last trip we were able to stay at the newly opened Pop Century because our youngest was just a week from turning 3! I was worried about that room being too small with two adults and a 9,7, and 2 year old but we were wonderful and cozy all week so I am sure POR will be just fine.
I did try making a reservation online but it won't let me. It says only four are allowed although I KNOW five are. I like making reservations online so I can pay with installments.

Has anyone else had any luck making online reservations for five at POR?