I am very confused about the listings in the Portsmouth area.

I am asking about this as i was about to start putting lots of reviews of Portsmouth pubs onto the site,but i then found that what i thought were Portsmouth pubs are not listed on the Portsmouth list,they are listed under a seperate town which i think does'nt exist,this town is Soutsea which i always thought was a suburb of Portsmouth.
While i am writing this i am looking at ordnance survey sheet 196 which includes Portsmouth, i may be wrong but i though Portsmouth was a city with a population of about 190,000 and this city happens to be on Portsea island,there are a few suburbs of Portsmouth, milton, fratton, north end, eastney, and southsea.
If as i think all these suburbs are included in Portsmouths population why are some of them not listed on Portsmouths listing but under Southsea which i dont think is a town in its own right.

I hope some of our south coast members can put some light on this situation.

very Alan.