Sql Left Join Issue with query

select um.DOCRcvdDt as InwardDate, um.ScanId,um.ProposerName as CustomerName,um.IntermediaryCode,um.ECNNumber,um.ProposalAmount,um.dtTime,um.Remarks,bb.BBName as Branch,i.NAME,
	it.[Description] as PaymentMode,r.InstrumentNumber,r.InstrumentDate,r.Amount as InstrumentAmount,a1.dtTime QC1PickedDtTime,ld1.Username as QC1UserId,a2.dtTime QC1DoneDtTime,
	a3.dtTime DEPickedDtTime,a4.dtTime DEDoneDtTime,a5.dtTime QC2PickedDtTime,a6.dtTime QC2DoneDtTime,ld2.Username as DEUserId,ld3.Username as QC2UserId,
	a7.dtTime as PolicyIssuedDtTime,sm.ContactId,sm.ProposalNo,sm.PolicyNo,sm.ReceiptNo,ld4.Username as ScanUserId
	from UploadMaster um
	left Join LoginData ld
	on um.ProcessedBy=ld.Id 
	left Join BBMaster bb
	on ld.BBId=bb.Id
	left Join IMD i
	on i.[IMD code]=um.IntermediaryCode
	left Join T_Instrument_Type it
	on it.ID=um.PaymentMode
	left Join Receipt r
	on r.TxnId=um.ScanId
	left Join Aging a1
    on a1.UpldMstrId=um.Id and a1.Status='QC1 Picked'
	left Join LoginData ld1
	on ld1.Id=a1.UpdatedBy
	left Join Aging a2
    on a2.UpldMstrId=um.Id and a2.Status='QC1 Accepted'
	left Join Aging a3
    on a3.UpldMstrId=um.Id and a3.Status='DE Picked'
	left Join LoginData ld2
	on ld2.Id=a3.UpdatedBy
	left Join Aging a4
    on a4.UpldMstrId=um.Id and a4.Status='DE Accepted'
	left Join Aging a5
    on a5.UpldMstrId=um.Id and a5.Status='DE Picked'
	left Join LoginData ld3
	on ld3.Id=a5.UpdatedBy
	left Join Aging a6
    on a6.UpldMstrId=um.Id and a6.Status='DE Accepted'
	left Join Aging a7
	on a7.Status='Policy Issued' and a7.UpldMstrId=um.Id
	left Join StatusMaster sm
	on sm.TransactionId=um.ScanId
	left Join LoginData ld4
	on ld4.Id=um.EmpId