Meta Pixel & Shopify Quantity Fix

My Meta Pixel is already installed on Shopify, yet events only reach Events Manager after an obvious delay. I need someone to investigate why this lag occurs, confirm every standard event fires in real-time, and leave clear proof (e.g., live test events, console logs, or screen-share screenshots) that the issue is resolved.

At the same time, a single product page has a quantity selector that refuses to update the cart total. The visual stepper appears, but whatever number you choose, the cart still adds just one unit. I’d like that behaviour corrected across desktop and mobile, matching the storefront’s current theme code without breaking any other templates.

Key outcomes I’m after:
• Real-time firing of the existing Meta Pixel events (PageView, ViewContent, AddToCart, InitiateCheckout, Purchase).
• Functional quantity selector that updates the mini-cart, full cart, and checkout consistently.
• A short note on what you changed so I can keep those snippets documented for future theme updates.

You’re free to use Facebook Events Manager, Pixel Helper, Shopify theme code editing (Liquid/JS), or any diagnostic tools you’re comfortable with, as long as both issues are fixed and verified.