Checkout Upsell Funnel quantity issue

Greeting, I’m using checkout upsell funnel free plugin. I just added more than 10 products in upsell but only 6 or 8 showing. I want to add more when I have tried to put more products they are not showing on checkout page. I have increased limit to 30 products as well but did not get the result. Kindly check it and provide me solution about it. thanks