Card Visuals with DAX not Showing Correct Data

Hello all,

Just wanted to say that I solved the problem and for anything reading, I'd like to suggest the following, in order, whenever you come across an issue - 

1) - Check the data uploaded is correct and the most up to date (this was my issue).
2) - Then check the relationships.
3) - Then check your DAX for further problems.

Thanks for everyones replies.