the error of lack of fit and analysis of variance

[#1]

i meet a question when i deal with the problems in Design and analysis of experiment.this is a two-level full factorial design with 4 center points.in my opinion，the error in lack of fit is same to the error in analysis.but i dont get the same result in this report.here are relative data and analysis report：

and here is the solution in this book‘s solution manual

i cant get the same result

[#2]

Open Effects Test

[#3]

the result of effect  test have the same question.because of the difference of pure error between lack of fit and analysis of variance，the F-value is relatively large than standard answer.I have tried to add different terms in my model and still dont work.

is there some problems in the terms chosen stage?