Yeah, I have two of them!  Keep it.  Someday your grandkids will have a good laugh that there was ever a time when we relied so heavily on this nonsense.

By then -- most probably after a few more Robert Hanssen-style episodes at the Bureau -- you may find it comical, too.

PS: You may not want to bother appealing.  You may request documentation, file a letter or protest, etc.  But my hypothesis is basically that they only bear the expense of multiple tests because they assume examinees will attempt countermeasures (just like they assume lies on probable-lie questions), and therefore they consider it a chance to learn more about the CMs in use.  If being the subject of such an encounter sounds fun, more power to you.  I think the chance of success on a second test is very, very slim.