CE Practice Exam Form 3 Case Study Question

Hi everyone! I’m currently studying for CE as my first exam. I’m confused about this question in the case study. I have attached screenshots of the question with its correct answer and the project schedule provided by the case study. Could someone please explain how Week 10 is not the correct answer?

Thank you!

Day 3 of testing is Wed of week 8. Once you add 2 weeks to that for testing and install, that falls on Wed of week 10 to be complete. Owner training starts the first day of the following week, which will be Mon of week 11.