Contributors Summary Incoherent Data Displayed

When setting a Contributors Summary Macro in a page, the data shown is incoherent when different users access the same page. Currently, the data displayed can not be trusted and the macro is useless.

 h3. Steps to Reproduce

1. Create a Page
2. Add a Contributors Summary Macro
3. Configure it to include children or descendents
4. Restrict some of the child or descendant pages so some users can't see them.
5. Save page

Expected Results

The data show is consistent and is the same regardless of who is accessing it.

Actual results

The data is inconsistent and show different numbers when normal users and admin users access it. There is even difference when different Administrators access the macro.
This might be due to page restrictions, groups and permissions.

Attached screenshots of the macro settings and also the data being shown for different users.