Calculating Current Year Team Targets based on Past Years Team Shares in a constant way

Hi,

I hope somebody can help.

In PowerBI I want to calculate the Current Years Target per Team and Calendar Week. The weekly Total Target is given. The Share per Team shall be as of Last Year and can be derived from the Actuals.

I have calculated this already in several measures in my Model, but I am facing two Problems:
a) In case I add a Slicer to the Teams, the Share for the Team gets recalculated to 100%
b) The resulting Targets are different to when I use a Martix Visual (Incorrect Shares) to a Stacked Column Visual (Correct Shares), whereas in both visuals all Slicers, filters, Measures etc. are identical.

How can I fix this and how can I calculate once and constant the Share per Teams, based on Last Year's Actual WorkLoad?

Here is what I have done:

1. Workload per Team and Calendarweek:

WL_perTeam_CW=
IF(SELECTEDVALUE('SD Staff [Teams] IN Values('Selected Teams[Sel.Teams])
 SUMX(
    VALUES('SD Staff [Teams]);
    CALCULATE(
        COUNTROWS('DATA');
        'DATA'[CloseDate]<>Blank();
        'SD Staff '[StaffID]=MAX('DATA'[StaffID]);
        'SD Staff'[Valid From]<=Max('DATA'[CloseDate]);
        'SD Staff'[ValidTo]=Max('DATA'[CloseDate])
     )
    );
    0)
Idea: To have these type of data (works as well in visuals):

2. Workload Share per Team and Calendarweek:
%WL_perTeam_CW=
    IF(SELECTEDVALUE('SD Staff'[Teams]) IN Values('Selected Teams[Sel.Teams])
        DIVIDE(
        [WL_perTeamCW];
            CALCULATE(
           COUNTROWS('DATA');
             'SD Staff'[Teams IN Values('Selected Teams[Sel.Teams])
             'DATA'[CloseDate]<>Blank()
            );
         0);
    0)
Idea to have this type of data (this does not work with Slicers on visuals and gives different shares in Stacked column Visual to Matrix Visual)

3. WorkLoad Share per Team Last year 
%WL_perTeam_CW_PY =
CALCULATE([%WL_perTeam_CW];
SAMEPERIODLASTYEAR('Calendar IN'[IN Date])
)

4. Target Workload per Team and Calendarweek for the Current Year:
Target_PerTeam_CW =
VAR CWPlan = MAX(Target'[CW])
VAR Teams = SELECTEDVALUE('SD Staff'[Teams])
VAR SharePY = [WL_perTeam_CW_PY]
VAR Target_perWeek =
    CALCULATE(
        MAX('Target'[Total Target per CW]);
        'Calendar IN'[IN CW]=CWPlan)
RETURN
Target_perWeek*SharePY

The Idea is to get this type of Data - and being able to add slicers on Teams. Currently when I slice or filter one Team, the Target gets recalculates to the Total Target of 15.000. :

Any ideas?