The Telegram bot (which is really awesome, by the way), is showing that it was redeemed for 267.999 BTC. It seems to be double counting the change amounts after the test transactions. So when they spent the first 1 BTC, there was 98.999 returned as change. They sent another 30, leaving 68.999 as change. So the bot added 100+98.99+68.99 = 267.999 or ~$16 million in value.
I think I have noticed this on a few other alerts. At first I thought they were overfunded coins by the end user.
That's right - it does count the change.
I'm going to be updating the alerts shortly to only look at the value preceding the redemption block as a quick fix.
The long term fix is to discount any funding transactions after the first redemption transaction from the item valuations. That requires a slightly bigger update, so perhaps over the weekend.
Thanks for bringing it up, will be addressed shortly!