I would start by seeing what's different about the products not showing (maybe they are out of stock, or maybe they don't match the collection rules, etc).
If you'd like to have it fixed for you, my team can help you out - we all work on Shopify every day. If you prefer that just contact us at speedboostr.com/contact with your collection url and details of what's missing / what should be showing. One of our developers can check it out and give a quote to fix.
Founder of
Speed Boostr (Shopify optimization experts, theme customization, custom app development).
Creator of
Shopify Analyzer (first performance analysis tool for Shopify sites, free for the Shopify community).
Creator of
Order Automator (auto tag orders and customers + auto fulfill orders + email notifications).
Creator of
Theme Scientist (A/B testing app) and
Tip Jar (add a tip button to your store).
