Problemas con búsqueda formateada y criterios de selección

[danmar_12]

Buenos días.
Tengo el siguiente requerimiento, pero al incluir un filtro más, los criterios de selección salen incorrectos. Debería pedirme dos fechas y un agente de ventas, pero en cambio me pide 3 fechas.
De ante mano gracias a quien me pueda brindar ayuda.
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DECLARE @FINIQ DATE , @FFINQ DATE

SET @FINIQ = /*SELECT TOP 1 T0.DocDate FROM OVPM T0 WHERE T0.DocDate = */ [%0]

SET @FFINQ = /*SELECT TOP 1 T0.DocDate FROM OVPM T0 WHERE T0.DocDate = */ [%1]

Declare @Agente = /*Select top 1 slpname from oslp where slpname =*/ '[%2]'

Select * from(

SELECT

t0.CardCode,

T0.CardName,

'Activo' Status,

t1.SlpName'A.V.',

(Select Docnum from OINV Where Docentry = ((Select max(docentry) from oinv where cardcode=t0.cardcode)))'Factura',

(Select DocDate from OINV Where Docentry = ((Select max(docentry) from oinv where cardcode=t0.cardcode)))'Fecha Última Compra',

(Select DocTotal from OINV Where Docentry = ((Select max(docentry) from oinv where cardcode=t0.cardcode)))'Monto Última Compra',

(Select count(docstatus) from OQUT where DocStatus = 'O' and t0.CardCode = CardCode)'Ofertas Abiertas',

(Select count(docstatus) from OQUT where DocStatus = 'C' and CANCELED = 'N' and t0.CardCode = CardCode)'Ofertas Cerradas',

(Select count(docstatus) from OQUT where DocStatus = 'C' and CANCELED = 'Y' and t0.CardCode = CardCode)'Ofertas Canceladas' FROM

OCRD T0 INNER JOIN OSLP T1 ON T0.SlpCode=t1.SlpCode

left JOIN OQUT T2 ON T0.[CardCode] = T2.[CardCode]

WHERE

cardtype='C' and

ValidFor='Y' and

frozenFor='N'

union select

t0.CardCode,

t0.CardName,

'Inactivo' Status,

t1.SlpName'Vendedor',

(Select Docnum from OINV Where Docentry = ((Select max(docentry) from oinv where cardcode=t0.cardcode)))'Última Compra',

(Select DocDate from OINV Where Docentry = ((Select max(docentry) from oinv where cardcode=t0.cardcode)))'Fecha Última Compra',

(Select DocTotal from OINV Where Docentry = ((Select max(docentry) from oinv where cardcode=t0.cardcode)))'MXP',

(Select count(docstatus) from OQUT where DocStatus = 'O' and t0.CardCode = CardCode)'Ofertas Abiertas',

(Select count(docstatus) from OQUT where DocStatus = 'C' and CANCELED = 'N' and t0.CardCode = CardCode)'Ofertas Cerradas',

(Select count(docstatus) from OQUT where DocStatus = 'C' and CANCELED = 'Y' and t0.CardCode = CardCode)'Ofertas Canceladas' FROM

OCRD T0 INNER JOIN OSLP T1 ON T0.SlpCode=t1.SlpCode

left JOIN OQUT T2 ON T0.[CardCode] = T2.[CardCode]

WHERE

cardtype='C' and

ValidFor='N' and

frozenFor='Y') a where a.[Fecha Última Compra] between @FINIQ and @FFINQ and a.[A.V.] = @Agente