Please note KPIs are linked to Calendars which is then used to calculate the Actuals(Bars) and Target(Line).

From the assigned Calendar the Target is calculated by using the number of working days specified together with the Calendar Month Start and End Date.

i.e 

i.e.  If for November the captured Target is 1103, the displayed target will be calculated as For Nov daily target =(target/working days) = (1103/31) = 35.58.

                           then the month target value will be daily target*number of days in the month: 535.58.*31=1103.

                                   as a result, should the working days be less or more than the number of days in the month the displayed value will be different.