It sounds like a temporary glitch to me. Those smilies are coming up normally for me today.

I usually maximize the "More..." window to make it easier to see what's there. I don't know if all browsers have this capability, but my Firefox lets me use Ctrl-F to search for a smilie by approximate spelling. Searching for [bang], for instance, will take me to the ones called "banghead" and "headbang".

Other members have pointed out that the order of the smilies changes occasionally. That's never been much of a problem for me. If I'm looking for one that I don't use much, I may as well see what else is available too. The ones I use most, I memorized the spellings of long ago so I don't even have to look them up.
Did you happen to notice what the rest of the page said?

If I had any suspicion that it was my browser playing tricks, I'd try first closing and relaunching my browser, then shutting down and restarting my computer. Whenever a problem seems to be originating either at PC or along the Internet, it usually clears up if I wait a while -- or at worst, gets found and cleared up.

How is that smilies page acting for you today?