Hi Orson,
2D and 36A are the 2 answers which "must have their letters jumbled together to produce their 2 entries."
15A and 9D are the "which has left affected entries in 2 other clues", the letter in these 2 is omitted from the definition prior to solving the clue. In the 25, there is an extra letter in the answer which is omitted from the entry.