Just as a further confusion, are you aware of the Bastardy Order on Henry ALBURY for a child by Ann MILLER in East Farleigh in 1792? That would be two years after he was supposed to have married Margaret. It says that Ann was single but didn't specify for him.
West Kent Quarter Sessions Index 1788-1804
SURNAMEFORENAMEYEARPLACETYPE OF RECORDCOMMENTFOLIO MillerAnn1792East FarleighBastardysingle, see Henry Albury317