I'm sorry to inform you that this auction was poorly handled.
Changing the time limit of an auction after setting it isn't allowed and you need to be sure to put an end to your auction once the Pokemon/Item has been sold to someone.
These two things are breaking this rule:
12. In auctions, the auctioneer should respect PRO's Auction Rules, using Auction Template, announcing the item(s)/pokemon(s) being auctioned, call and acknowledge bids made, and announce the winner, said rules should be respected.
From now on I hope that you will follow our Trade Rules and make sure to thoroughly read them. Also if you are unsure of how to hold a proper auction, be sure to read this Auction Guide.
Hopping you a good day,
Rayjuu.