Please help me identify my orders

Right now I'm testing and figuring out how FlentCart works, and I can't wrap my head around something.

How can I simply and constantly identify my orders? Seems a bit silly, hear me out:

• it would be logical that each order has a unique order number or ID (it may have, I can see that when I open an order)
• in the Orders table's first column for paid orders there is the invoice number (I really don't need any invoices and inv. number, but cannot turn off) - how can I put the Order number in a column?
• the problem is, if a customer place an order, I'd use the {{order.order_ref}} to tell them what to put in the bank transfer comment
• if the order is not paid, that order_ ref = order ID, but after it's set to paid, order ref becomes equal with the invoice number -- that seems crazy to me

So right now the only way to identify an order properly is to open the one I suspect will be the one I'm looking for.

Is there something I'm missing in the setup process? I assume my logic is more UX friendly (to have one unchangeable ID, shown in certain places) than the current solution.

I hope you understand my jumping reasoning :)