previousmonth not working as expected in matrix?

[PowerBITesting]

last month Sales = CALCULATE(SUM(Sales[Sales Amount]),previousmonth('Date'[Date]))

 I have matrix with Contact name, Total sales and Difference in % for Current and Previous Month columns , As I dont have date coulmn in matrix I have added a date filter in the Visual level , But previousmonth is not working as expected?

[Anonymous]

@PowerBITesting 

Can you provide a sample pbix without sensitive data? That is the most straight forward for us to understand your model.

Regards
Paul

[Greg_Deckler]

@PowerBITesting No real surprise there, T"I" functions become more of a hassle than a help if not used in very specific ways. 

You may find this helpful - https://community.powerbi.com/t5/Community-Blog/To-bleep-With-Time-Intelligence/ba-p/1260000

Also, see if my Time Intelligence the Hard Way provides a different way of accomplishing what you are going for.

https://community.powerbi.com/t5/Quick-Measures-Gallery/Time-Intelligence-quot-The-Hard-Way-quot-TIT...

Would need sample data and expected output to b specific.