Stack trouble during DLL call?

Am I missing something here?  The stack needs to be "adjusted" by 8 bytes in Delphi after returning from the call but I have no idea why!

  asm
    pop EAX;
    pop EAX;
  end;

double* are pushed onto the stack as a DWORD pointer
BYTE are pushed onto the stack as values
double is pushed onto the stack as 8 bytes of data

Thank you for your help!
MP

Here's the Visual C++ DLL function export:

int _stdcall GetPoly(
     BYTE p_bTypeOfData,
     BYTE p_bAnode,
     BYTE p_bFilterType,
     double p_fThickness,
     double p_fkVp,
     double* p_dC0,
     double* p_dC1,
     double* p_dC2,
     double* p_dC3,
     double* p_dC4,
     double* p_fkVpLo,
     double* p_fkVpHi,
     double* p_fTotFiltrLo,
     double* p_fTotFiltrHi);

// here's my Delphi 5 declaration for the DLL function
function GetPoly(
     iTypeOfData,
     iAnodeType,
     iFilterType:byte;
     dThickness,dKV:double;
     var dPoly0,dPoly1,dPoly2,dPoly3,dPoly4:double;
     var dKVLow,dKVHigh:double;
     var dTotalFiltrLow, dTotalFiltrHigh:double):integer;
     StdCall;
     external 'MyDLL';

Here's my call for the function:

Result:=GetPoly(
     iType,
     iAnode,
     iFilter,
     dThickness,
     dKV,
     dPoly1,
     dPoly2,
     dPoly3,
     dPoly4,
     dPoly5,
     dKVLow,
     dKVHigh,
     dLow,
     dHigh);

// now I need to remove 8 bytes from the stack if things are going to work properly.