Well thank you for your answer Mike. The problem that Egyptian collectors all face is that having to send notes back to PMG for regrading is by no means an easy task. It is very costly and sometimes airport customs confiscate the notes for unknown reasons. For that matter, mistakes on labeling notes are very devstating and unfortunate for Egyptian collectors.
On the other hand, I do agree with you that paying top dollar for top pop notes is a gamble that is unlikely to payoff,and that it is possible for later graded notes to achieve a higher grade.
Nonetheless, it is a well known fact that Egyptian notes printed during this period are highly unlikely to achieve a grade of more than 67/68. So, for this particular note a 67 seems to be a reasonable top grade unless a magical 68 appears somehow!
Either way, I really lost much of the confidence I had in PMG's population reports to be honest.
Lastly, bear in mind that this is by no means a cheap paper and the owner of the higher graded note is likely to suffer a huge loss because of this mistake/change in how PMG assigns a pick to these notes. It is unfair for someone who cannot send the paper back for regrading to suffer a loss just because PMG decided to add these notes under a different pick number or because they just forgot the put the letter a on the label. Right now, when you verify the note there is absolutely nothing; no image and no population report!