Filter Issue

[DataSundowner]

Hello everyone. I'm wondering why the "MonthsAgo" filter wouldn't work in this model? If I change it to >0 and <=3, it works. If I change it to =3, it works. If I replace the filter and apply a filter on date, it works. Only when I set it to >=0 and <=3, it doesn't work. Looks like it's treating null value as 0? Thank you in advance. 

[AlexisOlson]

I think the main problem here is that your date dimension table, Dim, doesn't contain all of the dates in your Fact table (specifically Jan 1, 2019). This makes for an invalid relationship where you've lost referential integrity and you'll run into all sorts of issues.