Bracket Filter Problem

I am trying to write a filter that will collect data from two different
machines and two different ports.  In looking at the Wiki and manual the
following line should work

(host 55.55.55.49 and port 2433) or (host 55.55.55.246 and port 5786)

As well this should work

port 2433 and (host 55.55.55.49 or host 55.55.55.63) 

however they do not.  They work separately however when I add the
brackets and join them.  Any ideas on what I am doing wrong?

Paul