Anybody explains to me this FB Ads Data !! Driving me Crazy...

Hi,
I was reading a blog about FB ads tips and the author is giving some case study data from his campaign . i don't want to judge him by using fake data or no (maybe i am wrong)but this image is driving me crazy for like 30mins.
i will appreciate any help : His Ad reached :6663 persons and he got 90 clicks so the CTR should : (90/6663) *100 =1.35% and NOT 0.261%

His Ad reached :21304 persons and he got 697 clicks so the CTR should : (697/21304) *100 =3.271% and NOT 1.773%

Thank you

Facebook might be shaving the CTR? Other than that I have no idea...

facebook sucks on ads, they always have a wierd %

Lol the frequency is over 5. that means the average person is seeing that ad 5 times. thats why your estimated ctr is roughly five times more than what facebook is saying.

Yeah I think facebook is lowering CTR

IMO, I would rather focus on CR than CTR. Sure you can optimize CTR for cheaper clicks but a high CTR won't always lead to a great CR.