If we use SOAP call we are not getting correct "Total stones found number" for set parameters

Here are details

To get diamond feed by SOAP call we set search parameters.

Number of diamonds found by SOAP call is much lower as compared to number of diamonds found by Rapnet's diamond search(after rapnet login).

Code sample (Search parameters)

Below mentioned criteria set for SOAP call

$page = '1';
$pageSize = '50';
$searchparams["ShapeCollection"]['Shapes'] = array("ROUND","PEAR","PRINCESS","MARQUISE");
$searchparams["LabCollection"]['Labs'] = array("GIA", "IGI", "AGS", "HRD", "EGL_USA");
$searchparams["SizeFrom"] = "0.30";
$searchparams["SizeTo"] = "30.00";
$searchparams["ColorFrom"] = "D";
$searchparams["ColorTo"] = "L";
$searchparams["ClarityFrom"] = "IF";
$searchparams["ClarityTo"] = "SI2";
$searchparams["CutFrom"] = "EXCELLENT";
$searchparams["CutTo"] = "FAIR";
$searchparams["PriceFrom"] = "0";
$searchparams["PriceTo"] = "10000000";
$searchparams["SymmetryFrom"] = "Excellent";
$searchparams["SymmetryTo"] = "Fair";
$searchparams["PolishFrom"] = "Excellent";
$searchparams["PolishTo"] = "Fair";
$searchparams["PageNumber"] = $page;
$searchparams["PageSize"] = $pageSize;
$searchparams["SortDirection"] = "ASC";
$searchparams["SortBy"]="SHAPE";

Can someone help to resolve this issue