Welcome to a normal Bank Holiday weekend where eBay is broke! Best Match has disappeared and all listings appear to be ordered by time ending soonest, regardless whether the item is fixed price or auction.
If you’re had recent sales or a boost for being a Top Rated Seller or for offering free shipping then this is not currently being reflected in search results. On the other hand there’s some good news if you’re an under-performing seller and being demoted in search… at the moment your listings are getting the same level of exposure as Top Rated Sellers.
No doubt the issue will be fixed in the not too distant future, but in the mean time if you gain some sales on a fixed price listing which is about to end make sure that you relist it as soon as possible – Once Best Match is mended you could receive an undeserved boost in search which can only be good for future sales.