You got the item re: Moses Dodd and Sarah Ann Passwaters from a really dreadful extract on CD from a card file that is in the Delware Archives.
This extract omits source information and includes some terrible misreadings of the material in the Archives. It is possible that there is something in the card file concerning a Sarah or Sarah Ann Passwaters that the subcontractor who did the extracts combined. You would have to go to the Archives in Dover to discover if this is so.It is possible that the bride mentioned in the Marriage Bond noted below was born a Passwaters and married at least once before she married some Moses Dodd - but this is complete speculation on my part, and DE records (such as estate and land records) would have to be consulted.
Ancestry recently put up images from the actual DE marriage records and marriage bonds, 1744-1912. It is badly indexed, but at least you can see what the actual record is (Ancestry has indexed Moses as 'Codd', but it is plainly 'Dodd' in the record).
The only item re: a Moses Dodd of this date, 22 Feb 1831, is a Marriage Bond, not a recorded marriage, between Moses Dodd and Abel Petty John [Pettyjohn] (the latter the bride's surety), concerning the impending marriage between Moses Dodd and what looks like Sarah Ann Pasadey or Pasaley, but the first initial of her last name could well be a 'C' with the lower curve carried up so it looks like a 'P'.It does not look anything like 'Pas(s)waters'.She was of Nanticoke Hundred.
There is also a Marriage Bond for the Dodd-Blocksom marriage you mention, with the date you have, but evidently not a recorded marriage. Since sometimes Marriage Bonds were recorded without there ever being a marriage, and since the couple could marry under the Bond within 30 days, it is wise to call the record what it is: a Marriage Bond, suggestive of but not proof of a marriage's having been performed.
Of course these could be two different Moses Dodds.