Well i also think charm of skill supply drop is a bug. It seems like a data is collected only for top 50 prices so if an order is canceled outside of those prices that event is only discovered after patch.
They should be collected for more than the top 50 on GW2BLTC, or at least that's what their "current buyers" tab leads me to believe. But it does indeed seem more like a graphical anomaly than anything else I can come up with right now.
I appreciate the update and hope you are feeling well! I tried Throne and Liberty as well but quit at level 40 because of the pay to win aspects and auction house. If I have to pay real money for gear there is no reward or reason for me to sit through the content. It's a game PERFECT for streamers though.
I've had this idea of trying to find a group to do the raids with and sell those purples on the AH for premium currency. See how far that'd get me. If you get from the world bosses rn, you can sell them for about 100 EUR worth of premium currency on the AH as well. It's probably a fools game, but an entertaining thought. The endgame dungeons are amazing, though. Especially some of the more difficult ones.
Those 7.5 mil and 2.5 mil orders are split between 30k and 10k buyers respectively. Now, I wouldn't be surprised if some of these were massive orders, while others are smaller. But it does indeed seem suboptimal. At this price, I'd list at 1g each, as it's more efficient, and if they ever crash to that price, I'd be happy picking em up anyway.
When you see Pay to Win aspects and real money transactions in Throne and Liberty you''ll know it's no threat to Guild Wars 2's longevity. Mid tier gear costs 10$-30$ in real money after the auction house is unlocked at level 40. $300 for high end gear can be simply bought for money. The whole Pre release playerbase consists of Streamers and Whales. So the feedback isn't going to improve the game for a majority of the Paying customers.