Recived and Invoiced Column in Vendor Order List

Hello All,
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There are two columns in the Vendor Order List View:

Recieved
Invoiced
My assumption has always been that Recieved (if its ticked) means that the order is fully recieved. The same as invoice(if ticked) has been PARTIALLY invoiced.

BUT, I have seen many examples where the ORDER is FULLY recived , but its NOT been ticked. And again, I have seen orders which have been PARTIALLY invoices, but its not ticked on the LIST view.

Can someone please help me in clearing this up please ??

Thanks