Pamela
I really don't think anyone is being rude or unaccommodating to you, unfortunately, and this applies to both people without AS as well as those with, we can all phrase things that can be misunderstood by others. Some people's style of writing can come across as abrupt even when they do not mean it, it's also up to the reader to give someone the benefit of doubt. I know since I've been annoyed on a few postings addressed to me in the past, but have given the person the benefit of doubt.
As for your George Mawbey (and as Valda has asked for no more postings to be place on the original baptism request posting), I really do think you should look into the George baptised in 1823 to Joseph and Ann at Southwark Christ Church. I appreciate you had read the birth date as applying to the mother rather than the child, but I concur with Valda that baptisms never included the birthdate of the mother, only that of the child when known. While it says the family were from Lewisham, Kent, as that parish is right on the border with Surrey, he is stil a possibility.
As his father is Joseph and his age ties in with other information you have, he could definately be a possibility. You say both George and his father were dealers. Joseph father of the George from Lewisham is listed as a carpenter but it is quite possible over the years he changed profession, possibly if he was unable to get work in his normal trade. I have blacksmiths who ended up working on the Docks because they could not get any work as blacksmiths. Also, it depends on who gave that information for the associated document, if it was one of George's children, they may not have known and just assumed their grandfather was a dealer too.
Which of the documents on ancestry.com.au are you having difficulty reading? I know Valda has already said that copyrighted documents can't be uploaded, but if you post the details I, and probably others, would be able to have a look at the original document on ancestry.
Nicola