Unfortunately, upon getting home being a little bit anxious about getting busted using synthetics I found out that they have apparently developed more advanced screenings and have been cracking down a lot more on them. I read that the majority of the cases have been happening in Oregon, Hawaii, and Florida.
What youve read were anecdotal reports without a shread of substantiation. None of these reports show any legitimate official documentation stating the reason why the synthetic didnt work for them. So until such documentation is provided, all of these anecdotes should be taken with a box of salt.

UltraPure is basically a Quick Fix clone. As long as the batch was unexpired and kept away from direct sunlight, its fine.