On the answer to Nathan, it says that 23/10/2009 is within 7 years of 26/08/2017. Surely this would be over 7 years and therefore change the answer? The date for the second CLT would have to be before 23/10/2016 to be in the 7 year cut-off.
You are correct in pointing out this error in the answer. I have made a note as another student has told me. The error will be adjusted when the manual is rewritten for the next FA. The year should say 23.10.10