Looking at class availability for an upcoming flight, (for the first time, really) and find:
A0 D0 Z0 Y9 H9 K9 N9 B9 O9 V9 U9 Q9 I9 S9 W9 T9

Does this really mean that A,D, and Z are sold out but there's a ton of Y? 'A' is available for sale on the website, so it can't mean the class is not offered. Or am I just reading this totally wrong?