Great question. This has never made any sense to me and I've argued it on multiple occasions with Seller Support and the
[email protected] team, but have never gotten anywhere close to an actual answer. My best guess is that it all comes down to how they've designed the algorithm that looks for high/low pricing errors. For reasons that have never made any sense, they appear to have indexed the algorithm to criteria that are individualized to a significant degree to a given seller rather than all sellers across the listing. It makes no sense and is frustrating as hell, but there's really not much that can be done about it. It's basically another "Thank you sir, may I have another?" situation with Amazon.