attribute dimension wrong behavior

Hi community

I am facing an issue with alternative hierarchy with member formula and attribute dimension members.

Turns out that , the alternative rollup retrieves wrong numbers when we have to do a subtraction using the Custom attributes

here the screenshots;

Also the parent member has this formula with two pass calc which is the same rollup above.

so the outcomes works only for one attribute, then when I select another one number are calculated wrong. (Exclude in this example)

I'll appreciate any help on this topic.

Javier D.