Exactly. I uploaded the pdf to Stubhub and didn't get any confirmation, saw some text flash by at the top of the screen but assumed the upload failed since I didn't get any confirmation page. Went ahead and repeated the process to upload, didn't realize it had gone through and the first sale I clicked on at my open sales page was the next preseason game. Duh, should always triple-check the uploads but it's too late and I wanted to go to sleep already. Now I am in the queue for Stubhub chat with 80 other people to upload re-generated pdf to the first game and remove the pdf uploaded to the second game, there goes the early bedtime... why do they even allow uploading the pdf to games that are more than 72 hours away, would be an easy step to at least ask "do you really want to do that?"
Thanks for the link to the old Stubhub version, hopefully I won't be making mistakes again!
(and all this to get rid of the preseason games at less than half of face value...)