XFgetcell pulls in future months as YTD negative

Here's the full code used to scale to thousands.  My original response missed the top 4 lines of code.

Dim viewMember As ViewMember = ViewMember.GetItem(api.Pov.View.MemberPk.MemberId)
Dim objaccountid As Integer = api.Pov.Account.MemberId
Dim objAccountType As AccountType = api.Account.GetAccountType(objaccountid)
Dim objTimeDimPk As DimPk = BRApi.Finance.Dim.GetDimPk(si, "Time")


If viewMember.IsAnnotationType = False Then
If api.Members.HasChildren(objTimeDimPk, api.Pov.Time.MemberID) And api.Data.GetDataCell("U8#None").CellStatus.IsRealOrDerivedData = True And objAccountType <> AccountType.Flow And objAccountType <> AccountType.Balance And objAccountType <> AccountType.DynamicCalc And objAccountType <> AccountType.BalanceRecurring Then
Return api.Data.GetDataCell("(U8#None) /1000").CellAmount
Else

Dim currTime As String = api.Pov.Time.Name
Dim currTimeID As Integer = api.Pov.Time.MemberId
Dim currPeriod As Integer = api.Time.GetPeriodNumFromId(currTimeID)
Dim currYear As Integer = api.Time.GetYearFromId(currTimeID)
Dim globalTime As String = BRApi.Workflow.General.GetGlobalTime(si)
Dim globalTimeID As Integer = api.Time.GetIdFromName(globalTime)
Dim globalPeriod As Integer = api.Time.GetPeriodNumFromId(globalTimeID)
Dim globalYear As Integer = api.Time.GetYearFromId(globalTimeID)
If currYear = globalYear And currPeriod > globalPeriod Then
If api.Data.GetDataCell("U8#None").CellStatus.IsDerivedData = False Then

If api.Data.GetDataCell("U8#None").CellStatus.IsNoData = False Then
If (objAccountType <> AccountType.Flow And objAccountType <> AccountType.Balance And objAccountType <> AccountType.DynamicCalc And objAccountType <> AccountType.BalanceRecurring) Then
Return api.Data.GetDataCell("(U8#None) /1000").CellAmount
Else
Return api.Data.GetDataCell("U8#None")
End If

Else
Return Nothing
End If
End If
Else
If api.Data.GetDataCell("U8#None").CellStatus.IsNoData = False Then

If (objAccountType <> AccountType.Flow And objAccountType <> AccountType.Balance And objAccountType <> AccountType.DynamicCalc And objAccountType <> AccountType.BalanceRecurring) Then
Return api.Data.GetDataCell("(U8#None) /1000").CellAmount
Else
Return api.Data.GetDataCell("U8#None")
End If
Else 
Return Nothing
End If
End If
End If
Else
Return Nothing
End If