After scanning London baptism records multiple times for my Smith ancestors I was confused why I found every baptism record for my ancestors siblings but not for the record for my ancestor Mary Ann Smith?
Well today I found it! Her record had a hyphen in it (Mary-Ann Smith). This and several other hyphenated records did not show up with all the others. So, if you are searching Parish records, remember names are often mispelled or perhaps your missing record has a hyphen too.
I often find the record I want on the 3rd or 4th round of searching!