LOL, wouldn't know who or where to begin. Gun stores get a YES or NO and if appealed, they get a YES NO or CONDITIONAL and any FFL that transfers on a conditional is nuts.
I've seen it happen. It's a sad story to see a firearm in limbo. It's essentially the gun stores as the transfer has been completed from the seller to the receiving gun store so legally, a shop can tell someone sorry and then sell it but "correct" is not always "right".
If this ever happens to anyone, DO NOT make a statement like "I'll have my brother/father/wife" just pick it up as YOU WILL NOT see that weapon (from a upstanding shop) as you have just stated you wish to do a straw sale. Work with both vendors for the best outcome. You may lose some money but you could lose it all being stupid and saying something Yeagerish.