Question about putting ability into items

First time to post and ask question here...

Recently I am adding abilities into my custom items on my maps, however I found that the item ability only recongized the first 4 of the item lists:nono:, is there any method to raise the "recongize cap" for inserting into items? (Inserting item ability on Unit doesn't have this problem)

Although triggers can solve the problem, but it causes serious lag when the item is purchased...:cuss:

I have no access to the Editor now, but I think that orb abilities have an Abilities field or something, and you can put more abilities there.

Tried but none of ability shows up in the orb :(

Though the ability parameters in DataA1 looks similar to the "Spell book" ability ...

You won't be able to get more than 4 abilities added per item. Says Blizzard.