The first was listed as "sold" and not "ended"? That sounds weird and I can't think how that was pulled off. Maybe the seller made a combination deal with another buyer on another item and included your item in the deal by adding a lower BIN price.

I'm not sure reporting the second seller will do much, especially since you bought one of the items. It's been a long time since that happened to me, but I counteroffer at the bid I had before the shill pumped it up.