Repeated measures ANOVA (EEMs vs descriptive means)

Hi all, I hope someone can help me to clarify one issue in my results. I´m running mixed ANOVAs in SPSS 22 with LL(slef-control) as measure, one fixed within subject factor (3 different probabilities) and one between subject factor (Question) that changes in each ANOVA runned (but it is always 2 categories: Ideal and Not ideal).

In the post-hoc results, the means of the probabilities (within subject factor) are different compared to the means showed in the Estimates Table. I can´t understand why the mean for the within subject factor changes from one table to another because the between subject factor has not been introduced in the analysis yet.

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Cause the between subject factor changes in each ANOVA runned, the n for each group mean are not equaly (i don´t now if this has an influence in this issue).

Why is it happening? Am I doing something wrong?

Thanks.