Minitab计算G R&R问题？

用Minitab计算一组数据(10、3、3)得到的结果如下：
Gage R&R Study - ANOVA Method

Two-Way ANOVA Table With Interaction

Source DF SS MS F P
Sample 9 2208.84 245.426 34.86 0.000
Operator 2 0.83 0.417 0.06 0.943
Sample * Operator 18 126.72 7.040 1439.99 0.000
Repeatability 60 0.29 0.005
Total 89 2336.68

Gage R&R
%Contribution
Source VarComp (of VarComp)
Total Gage R&R 2.3499 8.15
Repeatability 0.0049 0.02
Reproducibility 2.3450 8.13
Operator 0.0000 0.00
Operator*Sample 2.3450 8.13
Part-To-Part 26.4874 91.85
Total Variation 28.8373 100.00

Study Var %Study Var
Source StdDev (SD) (6 * SD) (%SV)
Total Gage R&R 1.53294 9.1977 28.55
Repeatability 0.06992 0.4195 1.30
Reproducibility 1.53135 9.1881 28.52
Operator 0.00000 0.0000 0.00
Operator*Sample 1.53135 9.1881 28.52
Part-To-Part 5.14659 30.8795 95.84
Total Variation 5.37004 32.2202 100.00
为什么有两组Gage R&R计算，且其算出的结果不同？

Number of Distinct Categories = 4
本组值为4合理吗？