HR retention problem calculations

Hi All, 

I treid following the solution here: https://community.powerbi.com/t5/Desktop/Retention-Rate-HR/td-p/474135

Unfortunately it only gives me cumulative hired/fired as the same for each year (see below). 

I think it is to do with the first two measures, as they just seem to gather all staff but I'm a little stuck as to whats going on here. 

To confirm, I have a date table with all dates from 2000-2050 and a year colum with just the year from these dates. 

I then have a second table with employee number, and have pivoted the other colums as per the example in the link above so I have a matching format. 

Is there a step I am missing or similar to get it to show the additions/leavers per year? 

Many Thanks in advance.