Disjunction absolutely does allow for a Will save for magic items. Spells and spell effects are canceled without a save, but magic items get a Will save of either their owner, or their own (2 + half caster level).
The items that he had made their savings through as if they where magic items. A spell casters spells per day isn't effected because you will notice it says Save: Will (object negates) as the save. Which means that objects get a save. And spells and spell like effects on the person at the time are taken off.
This means that some items made it while others just went away. That wand was a decent caster level wander and therefor made its save. Not many items make a save going through the field but it is possible to have some items do it. Meme can attest to that. He lost over 9/10th of his magic items.
Macbrea
And yes you may cast freely.
By the way, what are you talking about on the rules? Seems the link works fine for me.
Dondarrian snaps a shot off from the bow at the elf but the arrow gets caught up in the web.
Then he reloads and sends another shot at Lisa.
(Elf: Roll: 22 Effect: Hit cover Lisa:Roll: 27*(no confirm) Damage: 4)
Kalintr steps onto the ledge and fires an arrow at Kanyano, which hits. (Roll: 21 Damage: 3)
The wizards put up their last walls of fire and sit back and relax for the show.