I wonder about the validity of that page.
The one I have as "not confirmed" is confirmed in my log via EQSL and LOTW, both well before the date of his last upload.
He never sent me a card, nor I him.
So how would that be considered "not confirmed" ?
I think it has to with the QSL_RCVD field in the adif file. For example, V is for "verified" from LOTW and is not the same as Y - yes (confirmed) manually entered by the log user in response to a paper card
Paper QSL statistics page would not consider a LOTW qsl confirmation the same as an actual receipt of the paper card due to the value in the QSL_RCVD field not being "Y" but a "V" as it should be in response to a simple LOTW confirmation.
Wow. Too many words. I really am just guessing here.
Maybe somebody can correct me on this. I am curious.