I don't think setting up another page would help in this case.
I think this may already cause problems. Some auctions have put the details on one page to find its not the one used by most.
I think what unicorn is asking for, is basically for everyone to have a little more thought when other people are holding auctions already listed.
It seems some auctions (that are already on the list) are then having to change time for other auctions who decide they want theirs at that time, or very close to that time, and therefore squeezing in and running for a way longer period of time than anticipated.
When this happens, there is a knock on affect to auctions already placed.
I do believe people are fully aware of this also, but continue to do it.
Maybe something along the lines of one page, and an allotted amount of time for the auction would be good. If the auction finished in a lesser time, great. If it runs over and its constantly over, then maybe that auction needs to review the times so as to not effect anyone else.
At the end of the day working together works best