I was in your exact situation when i certified 3 years back. There was a new addendum out for 653 i believe. I ordered my books from a supplier who sells you books based on the body of knowledge required, as most do.
Of course, i received the newest edition of the books, however the body of knowledge showed an older addendum that was required.
I was told that the questions used would have only one correct answer that would be correct to both editions/addendums. I was told that they would not have any questions which would have a right answer according to the old addendum and a right answer according to the new addendum. The answers would apply to both editions or addendums. if not, they wouldnt use the question.
I,personally, didnt run into ANY problems with the two different addendums. if you run into a problem, challenge the question and you should be credited.