Rank on multipl dates

HI Anonymous ,

Do you mean rank by multiple columns? If this is a case, I'd like to suggest you use ISONORAFTER function: 

RANK3 =
COUNTROWS (
    FILTER (
        ALLSELECTED ( Table1 ),
        Table1[FullName] = SELECTEDVALUE ( Table1[FullName] )
            && ISONORAFTER (
                    Table[SubmitDate], MAX ( Table[SubmitDate] ), ASC,
                    Table[SentDate], MAX ( Table[SentDate] ), ASC
            )
    )
)

Reference link:

Sorting by multiple columns 

Regards,

Xiaoxin Sheng