Ok, just got off the phone, talked to rep and supervisor. FWIW, both very transparent, both showed total empathy to their credit. I returned the same empathy to them, as they were thrown in this situation unfairly as well. I was honest about this, and I do think it helped in getting a few nuggets of info:
When they got to work this morn, ALL reps (ground floor and supervision) received an 'urgent memo' they were require to digest about the Epcot posters and were issued criteria/responses for what to say to the incoming swarm of angry/frustrated communications.
The responses given are canned/vanilla in nature because it seems several layers up the chain don't even understand what is going on, so its uninformed informing more uninformed. Some care, some don't. (Lunch hour is on the horizon.)
The rep said "the SD site and tech behind it that we need to do our job is STONE AGE, and Disney refuses to solve the constant issues from these posters and other releases".
Both people I talked to said they believe me that the cancelations are arbitrary and untruthful. Person A carting and buying well before Person B should never lose out on a product to B, and this was the biggest points they found a tad ridiculous/distressing tbh.
They also believed me that the arbitrary cancelations are also someone deciding that early orders are bots and that 'they are doing their job to stop bots'. So ridiculous, but to be fair, this was said in agreement with my points.
The supervisor had no intel on the times of final poster sales, for any of the three. He was unclear about who would to boot. He did however, have me email him screen shots of my purchase timestamp (with Joy), the email confirmation timestamp, and then the subsequent cancelation email timestamp. To his credit he said he would escalate this and do what he could to have whoever handles these reevaluate and reorder cancelations and successful orders based on timestamp.
Will update when I hear back, which he said would happen, but who knows.