Employees headcount

Hello, I have basically 3 tables, Calendar Table in which i have dates from 1/1/2019 to 12/31/2020 Timehseet table in which I have timesheet data, suppose I have 1000 employees and in a particular week only 800 employees have filled time sheet so it will have data for just 800 emplyee for latest week.
and last i have employee table in which i have all employee information, date of joining and date of termination 

i made an active relation with calender's date to timesheet date
and another active relation of timesheet employee id with employee's table employee id

and 2 inactive relation of emplyee and calendar table on start date and end date with calendar date

and i am using these measures 

Headcount = CALCULATE(COUNTROWS('Employee count'),FILTER(VALUES('Employee count'[End_Date]),OR(ISBLANK('Employee count'[End_Date]),'Employee count'[End_Date]>=MIN('Calendar'[Date]))),FILTER(VALUES('Employee count'),[Start_date]<=MAX('Calendar'[Date])))

 

 

 

Employee Left = var a = YEAR(MIN('Calendar'[Date]))

var b = MONTH(MIN('Calendar'[Date]))

return

CALCULATE(COUNTROWS('Employee count'),FILTER(VALUES('Employee count'[End_Date]),YEAR('Employee count'[End_Date])=a && MONTH('Employee count'[End_Date])=b))

 

 

 

Eployee Joined =

var a = YEAR(MAX('Calendar'[Date]))

var b = MONTH(MAX('Calendar'[Date]))

return

CALCULATE(COUNTROWS('Employee count'),FILTER(VALUES('Employee count'[Start_date]),YEAR('Employee count'[Start_date])=a && MONTH('Employee count'[Start_date])=b))

 

 

the result of these dax measure is not coming okay because these measures are following the active path to filter data which is calendar-timesheet-employee, but i want the calendar to communicate directly with employee.  

 

Can you please help me out I am stuck in this.

 

 

This is the actual result. 

 

Please help me out.

Thanks in advance.