This is ONLY conjecture in several respects. First, the notation is "8AA", which isn't clearly explained. However, this 8AA problem, whatever it is, has a "period end date" of 6/5/2009 and a filing due of 5/6/2010. So, that in my mind links this to the 1933 Act registration, which took effect 6/4/2009 after the market close.
Plus, my rudimentary knowledge suggests to me that they should have filed an 8-A shortly after the merger. Finally, "8AA" seems a lot like "8-A".
I have an email in to FINRA asking for an explanation.