Karsticles
Member
It really makes no sense.
It's probably the same reason they've limited the deck slots to 9 for so long, and then added more because they were forced to by including wild, and then only included it by removing basic deck slots and putting the extra deck slots there.
I imagine either the UI designers are completely inflexible in their UI design, or the software developers developed an unscalable mess for the menu. Most of their most baffling decisions would be explained by that.
World of Warcraft is renown for ridiculously messy and inflexible code among programmers.