It's usually a difference of around 1%, and it has two known causes.
1. When the order is counted
Mercado Libre sometimes counts the order when it's added to the cart, not when it's actually completed and paid. We count it when it goes through.
2. Multi-item orders
For Mercado Libre orders with several products, we count one order per product.
What matters: even if the order count differs slightly, revenue should match. If revenue differs too, that's when you should write to us and we'll look into it.
One smaller cause: the 30-day cutoff falls at a specific time of day, so the edge of the period can add or drop an order compared to the platform's report.