rereading the questions at leisure gives several opportunities for reinterpretation of the questions:
Q."perfume" is spelled from the first letters of "Pigs eat..."
- Depends what you mean by "first letters"

Q.The letters of "spoon feed" are in reverse alphabetical order. And the double letters are ?

Q. John's grandfather's daughter could be John's son's sister. Assuming the same John and apart from Alabama, you require half-relations. I do regularly sing (not a melodious treat) the song "I'm my own Grandpa" (and google found it at http://www.clinton.net/~sammy/grandpa.htm amongst others) so you just figure it out. Singing that to myself slowed me down at question 28 and that's my excuse for being in the measurable grades!
Rod