Problem Solved (Why why why?!?)

[Dogtamer]

@Lost_My_Marbles

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We think all of this is do [sic: due] to some bot or bots working on the listings and node trees. There have been changes to the keyword area (some attribute fields are being eliminated). We have also noticed that the same attribute (specifically the Category [item-type]) appears on different tabs (either Vital Info or More Details) for like items on the Manage Inventory edit pages.
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I harbor no doubt that your assessment is correct; that’s the reason why, since 2020, I’ve made so many posts of what I call ‘the loggerheads reply’ - most recently, right here in the SAS/BSFE on 30Jun23:

Unit Count - Suppressed Glimmer of hope.

A vast abundance of the available evidence strongly suggests that the ongoing PT [“Product Types and Attributes”] Initiative has found itself at loggerheads with the earlier-deployed Listing Quality, Search Conformity, & Brand Integrity Initiatives, inter alia, right from the get-go - and that now, more than three years after it first was launched (ca. Q3 2019), Amazon is still struggling, in Sisyphean fashion, with the unintended consequences inherent in its warm embrace of the Silo Management…

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Any troubleshooter/diagnostician/Systems & Solutions Engineer worth their salt would agree that in order to fix a problem, a firm grasp of the malfunctioning system’s Theory Of Operation IS the first prerequisite - but when a TOO is founded upon ever-shifting sands, as is the Amazon Global Catalog’s Browse Tree Node infrastructure, chaos inevitably & ineluctably ensues.