Auctions spend time in researching the offerings and to a certain degree their reputation is at risk if the screw up.
That may be true for Civil War-era, lever guns, colt pistols etc., but that is not the case imho when it comes to all these butchered, buggered, half-fake flint and early Federal era pieces. It seems to me (admittedly a stooge according to some here who know it all, so call me Curly...) that when it comes to earlier pieces, they are happy to simply parrot whatever the Kindig-era obsessed seller is willing to provide as manufactured fact and simply "overlook" with vague and bland commentary pretty much anything that may otherwise be a giant flaming red flag.
See the most recent "John Hovey 1775" musket/fowler at Morphy's as a case in point...
And I do not see how their reputation is at risk, as they make it a very pointed point (apologies for the redundancy) to NOT back up pretty much anything, which speaks volumes of wherein lie their true interests (i.e., it's not their reputation). Every description is sure to include a half-dozen speculative verbal exit doors to ensure that they can not be accused of outright fraud.
Back when we used to have a lot more fun here with friendly argumentative debate and infinitely less moderation, Earl was very fond of repeating a great mantra (paraphrase): "There's nothing wrong with saying 'I don't know.' "