Am I using ParallelPeriod right?

I'm differentiating between two time periods in my LOANHIST table- the current time period, and one month prior.  When comparing the two, taking into account a bunch of different filters, we can tell if a loan has been extended or renewed.  The date column we're using is "ACCOUNTING_DATE"- this lists the last day of every month.  

What I'm trying to build is something like this: 

...although we want one for the number of Renewals per month, and one for the number of Extensions.  My DAX isn't working- can anyone tell me why not?

This is what the model looks like: 

These are the columns in LOANHIST: 

And this is my DAX: 

NumRenewals5 =

VAR MatDate1 = MAX(LOANHIST[MAT_DATE])

VAR LoanStatus1 = MAX(LOANHIST[LOAN_STATUS])

VAR CurrentLoanTerm1 = MAX(LOANHIST[CURR_LOAN_TERM])

VAR CurrentAmzMos1 = MAX(LOANHIST[CURR_AMZ_MONTHS])

VAR MatDate2 = CALCULATE(COUNTX(LOANHIST, LOANHIST[MAT_DATE]),DATEADD(LOANHIST[ACCOUNTING_DATE],-1,MONTH))

VAR LoanStatus2 = CALCULATE(COUNTX(LOANHIST,LOANHIST[LOAN_STATUS]),DATEADD(LOANHIST[ACCOUNTING_DATE],-1,MONTH))

VAR CurrentLoanTerm2 = CALCULATE(COUNTX(LOANHIST, LOANHIST[CURR_LOAN_TERM]),DATEADD(LOANHIST[ACCOUNTING_DATE],-1,MONTH))

VAR CurrentAmzMos2 = CALCULATE(COUNTX(LOANHIST, LOANHIST[CURR_AMZ_MONTHS]),DATEADD(LOANHIST[ACCOUNTING_DATE],-1,MONTH))

VAR CurrStartDate2 = CALCULATE(COUNTX(LOANHIST,LOANHIST[CURR_START_DATE]), DATEADD(LOANHIST[ACCOUNTING_DATE],-1,MONTH))

RETURN

CALCULATE(

    COUNTROWS(LOANHIST),

        IF(

            AND(

                MatDate1<>MatDate2,

                LoanStatus1 <> "Commitment" &&

                LoanStatus2 <> "Cancelled"&&

                LoanStatus2 <> "PAIDINFULL"

            ),

        SWITCH(

            TRUE,

            CurrStartDate2 > MatDate1, "Renewal",

            CurrentLoanTerm2 <> CurrentLoanTerm1, CurrentAmzMos2 = CurrentAmzMos1, "Extension"

            )

        )

    )

 

 

Can someone get me onto the right track?

 

Thanks.

P.S. Here is some sample data: