Two sign out buttons?

Hi,

For some reason, I have two sign out buttons! This is in my Global Header template and the relevant code I am using is as follows. I have tried to use a php 'if' to display a 'Sign In' button whilst the user isn't signed in. And then display a 'Sign Out' button when the user is signed in.

<?php
  $cart_count = perch_shop_cart_item_count([], true);
  $cart_classes = 'cart';
  if($cart_count > 0)
  {
      $cart_classes .= ' has-items';
  }

  if(perch_member_logged_in())
  {
      $account_link_name = 'Sign out';
  }
  else
  {
      $account_link_name = 'Sign in';
  }
?>

<nav class="navbar is-transparent">
      <div class="navbar-brand">
        <a class="navbar-item" href="/">
          <img src="/assets/img/Sandford-Parks-Lido-Cheltenham.png" alt="Sandford Parks Lido is one of the largest outdoor swimming pools in the UK, set in landscaped gardens in Cheltenham, England." width="130" height="51">
        </a>
        <div class="navbar-burger burger" data-target="navbarExampleTransparentExample">
          <span></span>
          <span></span>
          <span></span>
        </div>
      </div>

      <div id="navbarExampleTransparentExample" class="navbar-menu">
        <div class="navbar-start">
          <div class="navbar-item has-dropdown is-hoverable">
            <a class="navbar-link" href="/">
              Shop
            </a>
            <div class="navbar-dropdown is-boxed">
              <a class="navbar-item" href="/photo-upload">
                Upload photo
              </a>
              <a class="navbar-item" href="/shop/checkout-stage-one">
                Required concession documentation
              </a>
              <a class="navbar-item" href="/concession-application">
                Apply for concessions
              </a>
            </div>
          </div>
          <a class="navbar-item" href="https://www.sandfordparkslido.org.uk/">
            Return to main site
          </a>
        </div>

        <div class="navbar-end">
          <div class="navbar-item">
            <div class="field is-grouped">
              <p class="control">
                <a class="button is-primary" href="/checkout" >
                  <span class="icon is-small"><i class="fa fa-user-circle-o" aria-hidden="true"></i></span>
                  <span><?php echo $account_link_name; ?></span>
                </a>
              </p>
              <?php if(perch_member_logged_in()): ?>
              <p class="control">
                <a class="button is-primary" href="/shop/logout">
                  <span class="icon is-small"><i class="fa fa-user-circle-o" aria-hidden="true"></i></span>
                  <span><?php echo $account_link_name; ?></span>
                </a>
              </p>
              <?php endif; ?>

So the relevant bit of code that isn't producing the results I intended is:

<?php if(perch_member_logged_in()): ?>

Would appreciate a bit of help...