Inconsistent Auction Data for TBC Classic

It appears that the Burning Crusade Classic Auction House API reports invalid auction data that presumably includes cancelled and/or expired auctions.

I have observed the following auction counts in the Horde Auction House on Venoxis (EU):

Time | #Auctions In-Game | #Auctions API
2022-05-02, 17:32 CEST | 85,205 | 103,474
2022-05-02, 18:19 CEST | 85,903 | 109,617
2022-05-03, 23:28 CEST | 87,278 | 117,067

The API reports consistently more auctions than there are live auctions in-game. The snapshot nature of the auctions provided by the API does not readily explain the significant discrepancy.

A similar issue has been discussed in the past:

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