eConnect Sales Order Payments Multicurrency DOCDATE Error 1321

First a little bit of background. The main company is setup with Z-C$ (Canadian currency) as the functional currency and we do sales in the US in Z-US$ as well. We take deposits on orders before they are produced and then the balance when completed. I have been using eConnect to insert a sales order with payments. If I attempt to insert a sales order with a Z-US$ currency and a DOCDATE different than the sales order DOCDATE I get the error below. I also noticed that the GP application itself disables the payment date and posting date controls in the multicurrency scenario. When I look at taSopHdrIvcInsert my guess is that it does this for currency exchange. I asked the users how they manage to enter payments with a different date than the sales order DOCDATE and they said that they change the sales order DOCDATE, enter the payment and then change the sales order DOCDATE back. Unfortunately I can't do that through eConnect or I am not aware of a way to do that and I have to put all payments on the sales order as a single xml file so that won't work with multiple payments with different dates. Any thoughts/ideas? Is there a way to turn off those restrictions?

Microsoft.Dynamics.GP.eConnect.eConnectException: Sql procedure error codes returned:

Error Number = 1321  Stored Procedure= taSopHdrIvcInsert  Error Description = The payment doc date must = the trx doc date for MC trxs

Node Identifier Parameters: taSopHdrIvcInsert

SOPNUMBE = ORD17627

SOPTYPE = 2

Related Error Code Parameters for Node : taSopHdrIvcInsert

DOCDATE = 2013-04-22

<taSopHdrIvcInsert>

 <SOPTYPE>2</SOPTYPE>

 <DOCID>REGULAR</DOCID>

 <SOPNUMBE>ORDxxxxx</SOPNUMBE>

 <ORIGNUMB />

 <TAXSCHID />

 <FRTSCHID />

 <SHIPMTHD>TRUCK/COM CARRI</SHIPMTHD>

 <TAXAMNT>0.00</TAXAMNT>

 <LOCNCODE>PLANT</LOCNCODE>

 <DOCDATE>2013-04-22</DOCDATE>

 <FREIGHT>484.55</FREIGHT>

 <CUSTNMBR>CASHUS</CUSTNMBR>

 <CSTPONBR>Qxxxxx-1</CSTPONBR>

 <ShipToName>Replaced Name</ShipToName>

 <ADDRESS1>Replaced Address</ADDRESS1>

 <ADDRESS2 />

 <ADDRESS3 />

 <CNTCPRSN>Replaced</CNTCPRSN>

 <FAXNUMBR>00000000000000</FAXNUMBR>

 <CITY>Lake Bluff</CITY>

 <STATE>IL</STATE>

 <ZIPCODE>60044</ZIPCODE>

 <COUNTRY>United States</COUNTRY>

 <PHNUMBR1>55555555555000</PHNUMBR1>

 <PHNUMBR2>00000000000000</PHNUMBR2>

 <PHNUMBR3>00000000000000</PHNUMBR3>

 <SUBTOTAL>1540.77</SUBTOTAL>

 <DOCAMNT>2025.32</DOCAMNT>

 <PYMTRCVD>1012.66</PYMTRCVD>

 <USER2ENT>Replaced</USER2ENT>

 <BACHNUMB>WEBORDERS</BACHNUMB>

 <FRTTXAMT>0.00</FRTTXAMT>

 <ORDRDATE>2013-04-22</ORDRDATE>

 <CREATETAXES>0</CREATETAXES>

 <DEFTAXSCHDS>0</DEFTAXSCHDS>

 <CURNCYID>Z-US$</CURNCYID>

 <ReqShipDate>2013-04-29</ReqShipDate>

 <CKCreditLimit>0</CKCreditLimit>

 <UpdateExisting>0</UpdateExisting>

 <CMMTTEXT>Need Van</CMMTTEXT>

</taSopHdrIvcInsert>

  at Microsoft.Dynamics.GP.eConnect.eConnectMethods.CreateTransactionEntity(String ConnectionString, String sXML)