The Brammoforum Wiki is working again. http://www.brammoforum.com/wiki
Nice catch! Steve and his "partner" are definitely not maximizing the space available on the seat in that shot! The intent is to ride on the raised portion behind the rider. Here's a photo that shows the proper positioning...Regarding the handles, they are required to classify the bike as passenger capable, but they are rarely used, with most passengers preferring to hold on to the rider.