Lyrics are NOT transcribed by a person sitting and listening the songs, who then types them out. This was definitely intentional on someone's part.
In the case of the Red album, I'm not so sure. Compare, for example, the lyrics to Please Please Me on the original LP release with the re-issue. On the original, which has the stereo version, they have printed John's vocal error:
At 1:27
John: "Why do I never even try, girl?" (John starts singing the second line of the second verse not the third verse.)
Paul: "I know you never even try, girl." (correctly sung)
(Of course following this flub, John half laughs the next "come on".)