I can see (maybe) that the guy would set them like this by accident (although he probably should get a different type job where it doesn't matter if he is ADHD) but I don't see how quality control didn't catch this. They probably looked at each coin individually and didn't lay them out as if they were a set and they probably didn't compare one coin to another to see that it was a sequential set. After all, a 1P coin is different from a 2p coin, etc so it didn't ring a bell that this was the same country and year and that while the values were different (which makes them entirely different animals) that they were in fact related.
I was under the impression that the rule was that the year always goes to the front? So that alone would have prevented this. But if that isn't their rule and they go by whatever is officially the obverse, that there would have prevented this as I doubt the different values have the definition of the obverse set in alternating fashion!
NGC probably won't be overly apologetic about it either. I've got the impression that if you don't spend twenty-five thousand dollars per month on grading fees with them that your concern really isn't a concern. They see this as not important and not a hassle to pack these and return to be corrected and then wait some more for them to get back in the mail. But to a collector that is important to have the coins and not do any more waiting. Or the collector may be disappointed in the grade and wants to sell them and try again with new coins and then the wait to get them back and ready to sale is a hassle And to a dealer, especially ones just getting started out that really need to make coins available for sale right away, this just puts a halt to cash flow until these get back corrected and available for sale. I've been there on that one!
While this may seem unimportant to NGC, it actually is important to their income, because the quicker a person can get a coin back from grading and sell it then the quicker they can buy more coins and hand them more money to grade them and start the process over again.
Apparently they have no use for additional income. Fat and happy.