How reliable is PROPTX sales data?

This detached house at 49 Trethewey sold for $970K on 2025-10-02 and then for $765K on 2026-01-22, so less than three months later. Something is wrong with this. Either the first sale fell through and was not rescinded, or it must be some creative exercise at market manipulation or accounting.

How reliable is the sales data from PROPTX anyways? It's not a HouseSigma issue - the same sales numbers are displayed on property.ca

https://housesigma.com/on/toronto-real-estate/49-trethewey-drive/home/nM697k5kgq6Ybmwe?id_listing=dXze3eeKQWp38m9K