POA Delivered, Shipment is showing delivered

We've just had our largest and most expensive shipment delivered, the type of money that if lost would give me a heart attack. So I'm a little jumpy.

The shipment was delivered at 10.30am today , we have a signed POD from Amazon saying they've received it. The shipment isn't showing delivered. It's not been long but should I be worried? Is it normal it takes a few days sometime to show delivered?