> When exactly do they show up, when the timer runs out on a banner or at X hours prior to that as written in the description?
Normally the auction will start 4 days prior and ends 1 hour before a banner expires.
> If there was a small window at least people would have a chance to grab their banner.
We have so many banners expiring this weekend (i think 60) that there is just not enough time to create auctions for all of them. Some will be skipped, others might show up for just a few minutes. We need to stick to the default interval of one auction every 4 hours or we run into the same problem again next month.
> Make a pop up text on the ladder page of a clan like 7 days prior to running out of the banner and give us the possibilty to buy it back w/o auction.
That's exactly what we don't want, there should always be the possibility for new clans to get an exclusive banner if they really want to (i.e., if they got the money).