They do it so next season they'll use the same URL slug/title and just replace the text and PDF, no trace of what the allocations were and criteria etc unless someone like Andy keeps track on here
Hope your private sheet is still up to date!!
When they issue selling details with mistakes or things they choose to later change, they can no longer do what they've done previously, which is to just retrospectively update the news article without any notification and pretend the previous version never existed. Now, people will have downloaded pdf's proving what they originally published. It still doesn't help if you don't spot the change, but at least there is evidence of what they're up to.
Most recent example was changing this weekend's game to extend the NFC section to all seats, but there was one case a few years ago where they actually changed the selling date. If it weren't for RAWK I'd never have known the sales article had been updated.