Amount Column repeating the same amount for each case

I am using an XML to render a report. Each row should display a single amount per case; for example:

row 1 .--->  validation number   caseid   payee name  check amount     check no

row 2 .--->        13331                   1234       john_name             120                   blank

row 3 .--->        13332                   1234       john_name             240                   blank

row 4 .--->        13333                   1234       john_name             340                   blank

row 5 .--->        13334                   2222       Mark_name             10                   blank

row 6 .--->        13335                   2222       Mark_name             20                   blank

row 7 .--->        13336                   2222       Mark_name             30                   blank

But it is display wrongly like this:

The Expression code looks like:

a!localVariables(
  local!data: reject(
    fn!isnull,
    a!forEach(
      ri!reportData,
      if(
        rule!CheckIsNullOrEmpty(fv!item.paymentRefValidationNo),
        if(
          index(fv!item,"checkPrtSeq",{})=1,
          fv!item,
          null
        ),
        {}
      )
    )
  ),
  local!xml: {
    "" & "" & cons!RPT_NAME_003_op_CHECK_REGISTER & "" & "" & todate(local(now(), "America/Chicago")) & "" & "" & totime(local(now(), "America/Chicago")) & if(
      isindaylightsavingtime(todate(now()), "America/Chicago"),
      " CDT",
      " CST"
    ) & "" & "" & "Total: " & dollar(
      if(
        rule!APN_isBlank(local!data),
        0,
        sum(index(local!data, "paymentAmt", {}))
      )
    ) & "" & "" & tostring(todate(ri!reportDate)) & "" & "" & "Batch No" & "" & "" & "Validation Number" & "" & "" & cons!DRO_CSO_FIELD_HEADER_CASE_ID & "" & "" & "Payee Name" & "" & "" & "Check Amount" & "" & "" & cons!DRO_CSO_FIELD_HEADER_CHECK_PRT_NO & "" & "" & " " & "" & "" & " " & "" & "" & " " & "" & "" & " " & "" & "" & " " & "" & "" & " " & "" & "" & " " & "" & "" & " " & "" & "" & " " & "" & "" & " " & "" & a!forEach(
      items: local!data,
      expression: {
        ""
      }
    ) & ""
  },
  local!output: stripwith(tostring(local!xml), ";"),
  local!output
)

Any help will be greatly appreciated.

Thank you.