Spring @Scheduled task runs twice

I am creating an @Scheduled task to run every 5 seconds. As has been a problem in other questions, my task is running twice!

I have looked at other questions, and read the applicable documentation here, but I have not been able to figure out the problem.

I know that two seperate instances of my @Scheduled class are getting instantiated when I start my tomcat server. I have also figured out when they are instantiated in reference to my log file.

One associated with this log line :

INFO: Initializing Spring root WebApplicationContext

and another with this log line:

INFO: Initializing Spring FrameworkServlet 'servlet'

Here is the spring config file.

<beans xmlns="http://ift.tt/GArMu6"
   xmlns:context="http://ift.tt/GArMu7"
   xmlns:xsi="http://ift.tt/ra1lAU" xmlns:mvc="http://ift.tt/1bHqwjR"
   xmlns:security="http://ift.tt/1c8inpe"
   xmlns:task="http://ift.tt/LFBt0P"
   xsi:schemaLocation="http://ift.tt/GArMu6 http://ift.tt/1cMYE2s
        http://ift.tt/1bHqwjR http://ift.tt/1fmimld
        http://ift.tt/1c8inpe http://ift.tt/1epvZ6L
        http://ift.tt/GArMu7 http://ift.tt/QEDs1k http://ift.tt/LFBt0P http://ift.tt/1je45tD">

<context:component-scan base-package="web.controllers"/>
<context:component-scan base-package="services"/>
<context:component-scan base-package="dao"/>
<context:component-scan base-package="scheduled"/>
<context:property-placeholder location="/WEB-INF/application.properties"/>

<mvc:annotation-driven/>
<mvc:default-servlet-handler/>

<task:annotation-driven />

And my simple java class:

package scheduled;

import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

@Service
public class Notifier {

@Scheduled(fixedDelay = 5000)
public void notifyUsersOfBidItems() {
    try {
        System.out.println(this);

    } catch (Exception e) {
        e.printStackTrace();
    }

}
}

Also, I am using Spring 4.

Thank you so much if you can help me!!!

EDIT: Adding web.xml

<web-app xmlns="http://ift.tt/nSRXKP"
     xmlns:xsi="http://ift.tt/ra1lAU"
     xsi:schemaLocation="http://ift.tt/nSRXKP http://ift.tt/1eWqHMP"
     version="3.0">
<display-name>Archetype Created Web Application</display-name>

<servlet>
    <servlet-name>servlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/spring_config.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
    <servlet-name>servlet</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/spring_config.xml</param-value>
</context-param>

<error-page>
    <error-code>404</error-code>
    <location>/error/notFound</location>
</error-page>

<error-page>
    <error-code>403</error-code>
    <location>/error/notFound</location>
</error-page>


<error-page>
    <location>/error/internal</location>
</error-page>

<!-- Spring Security -->
<filter>
    <filter-name>springSecurityFilterChain</filter-name>
    <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>

<filter-mapping>
    <filter-name>springSecurityFilterChain</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>