Tengo este codigo

declare @ReportLines table 
    (RebateInvoiceID int, 
     RebateSetupID int ,
     ShortItemNo float primary key(RebateInvoiceID,RebateSetupID,ShortItemNo),
     TotalAmount float,
     InvoiceTotal float,
     TotalQuantity int )
insert @ReportLines
select
  i.RebateInvoiceID
, coalesce(rs.WholesalerRebateSetupID,r.RebateSetupID)
, bl.ShortItemNo
, sum(round(r.Amount,2)) as TotalAmount
, sum(round(TotalAmount,2)) as InvoiceTotal
, sum(r.Quantity) TotalQuantity
from
  @Invoices i
  join RebateInvoices ri (nolock) on 
    ri.RebateInvoiceID=i.RebateInvoiceID
  inner loop join Rebates r (nolock) on
    r.RebateInvoiceID=i.RebateInvoiceID       
  join RebateSetup rs (nolock) on
    rs.RebateSetupID=r.RebateSetupID
  join BidLines bl (nolock) on 
    r.BidLineGuid=bl.BidLineGuid
  join @Products p on
    p.ShortItemNo=bl.ShortItemNo
  left join ChargebackDetailHistory cd (nolock) on 
    r.DocumentBranchPlant = cd.DocumentBranchPlant
    and r.DocumentNumber = cd.DocumentNumber
    and r.DocumentType = cd.DocumentType
    and r.LineNumber = cd.LineNumber
  left join EDI.dbo.JDE_SaleDetail sd (nolock) on 
    r.DocumentBranchPlant = sd.BranchPlant
    and r.DocumentNumber = sd.OrderNumber
    and r.DocumentType = sd.OrderType
    and r.LineNumber = sd.LineNumber

where 
    cd.InvoiceDate between @BeginDate and @EndDate
    or sd.InvoiceDate between @BeginDate and @EndDate
group by
  i.RebateInvoiceID
, coalesce(rs.WholesalerRebateSetupID,r.RebateSetupID)
, bl.ShortItemNo

Quiero sumar la columna del importe total de la factura de la columna del importe total. Cuando ejecuto la consulta anterior obtengo un montón de totales extraños. El total de la factura debe ser un número para cada fila y debe ser coherente con la rebateinvoiceid ya que eso es lo que está agrupado, ¿correcto?