Hi Sandra
It is comman to see the types of errors you have described, normally we blame the transcribers, but in this case having looked at the census page it seems mistakes were made in the transcription from original census forms as filed by the enumerator, and the person who transcribed into the books that we now rely on to do our research, it seems as if you have a whole barrow load of errors.
Thomas described as Phenos is a good example.
Hope this answers some of your doubts, and when doing a family although we have to be as acurate as possible,there is a great deal of detactive work and reading between the lines to be done.
Hope this helps
peterbennett