Magento – mini cart not showing items

You should try to make your changes in layout directly to the block or container you are changing.

In your layout, you are referencing the header.container and add all blocks additionally to the blocks already present. I think this could cause your problem.

To add the winkelwagen block, remove the original logo block and add your custom logo block. For example, try the following:

<referenceBlock name="logo" remove="true"/>
<referenceContainer name="header-wrapper">
    <block class="Customod\Test\Block\Html\Header\Logo" name="customlogo">
        <arguments>
            <argument name="logo_img_width" xsi:type="number">189</argument>
            <argument name="logo_img_height" xsi:type="number">64</argument>
        </arguments>
    </block>
    <block class="Magento\Checkout\Block\Cart\Sidebar" name="winkelwagen" template="Customod_Test::html/shopping_cart.phtml"/>
</referenceContainer>

on RWD default/template/checkout/cart/mincart/default.phtml line 158 replace this

            <a href="<?php echo $this->getAjaxDeleteUrl() ?>" title="<?php echo Mage::helper('core')->quoteEscape($this->__('Remove This Item')) ?>"
               data-confirm="<?php echo $this->__('Are you sure you would like to remove this item from the shopping cart?') ?>"
               class="remove">
                <?php echo $this->__('Remove Item') ?>
            </a>

with

            <?php if (strpos(Mage::helper('core/http')->getHttpReferer(), 'checkout/cart') !== false) { ?>
                <a href="<?php echo $this->getDeleteUrl() ?>" title="<?php echo Mage::helper('core')->quoteEscape($this->__('Remove This Item')) ?>" onclick="return confirm('<?php echo Mage::helper('core')->quoteEscape($this->__('Are you sure you would like to remove this item from the shopping cart?'), true) ?>');" class="btn-remove"><?php echo $this->__('Remove This Item') ?></a>
            <?php }else{ ?>
                <a href="<?php echo $this->getAjaxDeleteUrl() ?>" title="<?php echo Mage::helper('core')->quoteEscape($this->__('Remove This Item')) ?>"
                   data-confirm="<?php echo $this->__('Are you sure you would like to remove this item from the shopping cart?') ?>"
                   class="remove">
                    <?php echo $this->__('Remove Item') ?>
                </a>
            <?php } ?>

this will refresh cart page when you delete item from minicart