I have a list button for the Product2 object in my org that redirects to a VisualForce page. This VisualForce page displays the product name and description of all the product records that were selected in list view. That works fine, and I have the page rendered as a PDF using the renderAs tag.

renderAs="pdf"

My problem occurs when I go to download the PDF using the provided button in the browser. When I do this, the PDF is downloaded but the content shows the name and description of every single product record, not just the ones I selected.
How can I get the downloaded PDF to show only the selected records?
Am I missing something? I feel like this may be some sort of caching issue but I really don't know honestly.

Here is my VF code for reference:

<apex:page standardController="Product2" recordSetVar="prods" showHeader="false" extensions="CatalogueGenerationExt" renderAs="pdf">
    <!-- Static resource style sheet -->
    <apex:stylesheet value="{!URLFOR($Resource.cataloguegenstyle)}"/>

    <div class="main-containter" style="background-image:url('{!URLFOR($Resource.watermarkfull)}');">
        <div class="head">
            <div class="genTitle">
                Custom Catalog Generation (<apex:outputText value="{0, date,MMMM d',' yyyy - HH:mm 'GMT'}"><apex:param value="{!NOW()}"/></apex:outputText>)
            </div>
        </div>
        <div>
            <apex:repeat value="{!prods}" var="q">
                <div class="product-inner">
                    <div class="prod-title">
                        <h3>
                            <apex:outputField value="{!q.Name}"/>
                        </h3>
                    </div>
                    <div class="client-desc-cont">
                        <apex:outputField value="{!q.Client_Description__c}"/>
                        <apex:outputText rendered="{!q.Client_Description__c=Null}">&lt;No Description available&gt;</apex:outputText>
                    </div>
                </div>
            </apex:repeat>
        </div>
    </div>
</apex:page>