First, there isn't more to the story.
Second, the register rang it up at full price. Yes, it is possible it got missed by price change, it's rare they miss something but I've seen it. However someone on the sales floor isn't going to have a list of potential price change misses and checking for a missed price change is not something that really can be done via walkie. If the register says full price, what is the point of calling someone over the walkie to ask if it's full price or not?
Third, everyone seems to be missing the detail that made it go from "wow, weird" and then forgotten 10 minutes later to "what the fuck are they thinking???" It wasn't a question of if it was clearance. It wasn't a question of what would the clearance price be. I was given two choices, 70% off or 90% off. Those are both extreme price discounts. I wasn't asked "is it 30% or 50%", I was asked if it should be sold at a tenth of what the register said is the price. A lot of those sweaters, 90% off is more than the $20 limit. And while it would go under the other TM's number in the computer, if questioned then that person could tell leadership "Tessa authorized it." If they were that uncomfortable choosing that price on their own, they should be asking leadership if 90% off is okay, not me.