Strange Operation contract behaviour in wcf - wcf

Question

I have one WCF rest service operation contract which internally calls another service.
While making a call to another service, It adds certificate and makes a call to the other service.
My operation contract is like below
[OperationContract]
[WebInvoke(Method = "GET",
ResponseFormat = WebMessageFormat.Json,
UriTemplate = "/report/videodata/{component}/{count}")]
ServiceResponse CallcomponentHandler(string component, string count);
and my implementation is like below
public ServiceResponse CallcomponentHandler(string component, string count)
{
//Making HTTP Get Request to another service
return utility.GetResponse(Url);
}
But when I am trying to consume this Operation from internet explorer, This is getting called multiple times.
Please note the other service has async method.
I tried adding maxReceivedMessageSize,maxStringContentLength in web.config file but still not able to resolve this.
Below is my web.config file.
<?xml version="1.0"?>
<configuration>
<system.web>
<compilation debug="true" targetFramework="4.0"/>
<httpRuntime/>
</system.web>
<system.serviceModel>
<services>
<service name="Video.GetDetails" behaviorConfiguration="MyServiceBehavior">
<endpoint name="rest" address="" binding="webHttpBinding" contract="Video.IService1" behaviorConfiguration="restBehavior"/>
</service>
</services>
<bindings>
<webHttpBinding>
<binding name="StreamedRequestWebBinding"
bypassProxyOnLocal="true"
useDefaultWebProxy="false"
hostNameComparisonMode="WeakWildcard"
sendTimeout="10:15:00"
openTimeout="10:15:00"
receiveTimeout="10:15:00"
maxReceivedMessageSize="9223372036854775807"
maxBufferPoolSize="9223372036854775807"
maxBufferSize="2147483647"
transferMode="StreamedRequest" >
<readerQuotas maxArrayLength="2147483647" maxStringContentLength="2147483647" />
</binding>
</webHttpBinding>
<basicHttpBinding>
<binding name="Binding1" closeTimeout="04:01:00" openTimeout="04:01:00" receiveTimeout="04:10:00" sendTimeout="04:01:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferSize="1073741824" maxBufferPoolSize="1073741824" maxReceivedMessageSize="1073741824" messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true">
<readerQuotas maxDepth="1073741824" maxStringContentLength="1073741824" maxArrayLength="1073741824" maxBytesPerRead="1073741824" maxNameTableCharCount="1073741824"/>
</binding>
<!-- For Cyber Source bindings-->
<binding name="ITransactionProcessor" closeTimeout="04:01:00" openTimeout="04:01:00" receiveTimeout="04:10:00" sendTimeout="04:01:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferSize="1073741824" maxBufferPoolSize="1073741824" maxReceivedMessageSize="1073741824" messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true">
<readerQuotas maxDepth="1073741824" maxStringContentLength="1073741824" maxArrayLength="1073741824" maxBytesPerRead="1073741824" maxNameTableCharCount="1073741824"/>
<security mode="TransportWithMessageCredential">
<transport clientCredentialType="None" proxyCredentialType="None" realm=""/>
<message clientCredentialType="UserName" algorithmSuite="Default"/>
</security>
</binding>
</basicHttpBinding>
<!--Cyber Source bindings ends here-->
</bindings>
<behaviors>
<serviceBehaviors>
<behavior name="MyServiceBehavior">
<serviceMetadata httpGetEnabled="true"/>
<serviceDebug includeExceptionDetailInFaults="true"/>
</behavior>
</serviceBehaviors>
<endpointBehaviors>
<behavior name="restBehavior">
<webHttp/>
</behavior>
</endpointBehaviors>
</behaviors>
<protocolMapping>
<add binding="basicHttpsBinding" scheme="https"/>
</protocolMapping>
<serviceHostingEnvironment aspNetCompatibilityEnabled="false" multipleSiteBindingsEnabled="true"/>
</system.serviceModel>
<system.webServer>
<modules runAllManagedModulesForAllRequests="true"/>
<!--
To browse web app root directory during debugging, set the value below to true.
Set to false before deployment to avoid disclosing web app folder information.
-->
<directoryBrowse enabled="true"/>
</system.webServer>
</configuration>
Please help me on this.