Flippol said:I don't know why the time on your Steam achievements page shows that, but pulling the unlock timestamp from the Steam API shows an unlock time of Feb 15, 11:19 PM GMT.
So either the Steam achievement page is wrong, or the API. Since TSA uses the API for the source of everything, that's what is recorded here.
I can only say I know I did that achievement on the 14th - as cheap as it might be, I've been using that as one of the games where I do quick achievements just for the streak if I don't have the time for anything else - and I wouldn't have done two cheap achievements on the same day.
AStats puts me getting that achievement on the 16th at 00:19, so that's no help...
However the unlock time ended up different for the API, I guess this is a dead end now. Thanks for looking into it anyway.