obvious what? what? how do you determine an item dupe is happening from the data you have shown? ... what? dont spread false rummors when you can't prove something and even if that would be provable, you don't start 'here sharing' this but contact privatly the devs/admins so they can take care of shit ...
It's happened many times before yesterday to be sure (maybe when you were gone? pretty sure it was happening at the beginning of strat 4 as well). People put up forum posts, devs commented about it (I'm sure they tried to fix it) but it still happened. The duped gear was not deleted, and people ended up with millions and millions of silver due to the dupe. I've known about at least 6-10 other instances (that were publicly announced) before yesterday with the item dupe bug. It was happening a lot yesterday (according to people in IRC and people posting on forums) so it makes sense that others happened as well who were commanders in battles. Like mudertron said, it's completely anecdotal, but it makes sense.
One item dupe bug should have been enough to warrant a fix, deletion of duped gear, or a wipe of strat. Introducing "free" 100's of millions of silver into strat is game breaking. Massively.