[seyfin]

Actually, there are multiply lines of code that check the minimum order quantity for products, for example:

include/func/func.cart.php

    // Update the quantities

    foreach ($productindexes as $productindex => $new_quantity) {
...
        $amount_min = func_query_first_cell("SELECT min_amount FROM $sql_tbl[products] WHERE productid='$productid'");
...
        if (
            $new_quantity >= $amount_min
            && !empty($active_modules['Egoods'])
            && !empty($cart['products'][$productindex]['distribution'])
        ) {

            $cart['products'][$productindex]['amount'] = 1;
...
        }
    }