Thomas 2 (NZ), we think, did have a brother Richard who stayed in England. It's the brother Robert who died here, we can find no trace of at home in Kent.
There was also, sometimes, an age limit on people coming here and so they weren't always truthful about their age!!
A birth date of 1803 ties in with a marriage date for Richard and Mary of 1.2.1800
Thomas and Emma's son Richard came here also on the Cresswell, he is not listed on the passenger list as one of their children as he was classed as an adult but there is a R Maxted male on board.