Sadly you have no recourse with this as we can't force anyone to add every single trade to a PC report. Thats why everyone has to do a heap of research to make sure they are upto date on prices.
Other PC reports don't add every single trade. So it's not a new issue. It happens.
You are correct with the Conflict issue for trades.
Your post was not a trade it was calling into dispute a PC post and falls under flaming mild at that. It's not a ruling I made up it's a rule for the Forums as a whole especially that section. If you have issues with a PC you need to deal with it over PM or in person with the poster.
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