=FINDROW(Data,"THISROW()[Date] = $[Row_storage][Date] AND THISROW()[Project] = $[Row_storage][Project]")
I'd love to help you solve this issue. I'm assuming you have a table called Data and in the Data table you have a field/column for Date and Project, the Project column is formatted as Auto.
If my assumption is correct test using the following formula
=FINDROW(Data,"Data[Date]=$[Row_storage][Date] AND Data[Project] = $[Row_storage][Project]")
If you have your project column formatted as a RowLink let me know and I can provide an updated formula.
I hope my response is helpful!