Normally, the Wind Wizzrobe fires one enemy whirlwind, but the last time I checked, it was firing 8 whirlwinds in the cardinal directions. The problem is that its Misc 2 attribute was set to 1 by mistake in the default template. In addition, that Misc attribute is set incorrectly in other quests...
Here's why:
* Misc2:
0: No special behavior
1: Fires its weapon in each of the 8 cardinal directions
2: Summons an enemy instead of firing its weapon
3: Summons an enemy from a screen layer instead of firing its weapon