This very simple spell isn't working right...

[Aludar]

I'm having a lot of trouble getting a very basic spell to work:

I'm customizing Searing Arrows to make it deal a lot of damage but also have a 10 second cooldown. When I tested the spell, it works perfectly with my units, but when I give this spell to a creep, he constantly casts it, ignoring the cooldown. What's going on??

Also, with another basic spell...

I customized Shadow Strike into a simple Fireball spell and also made a Frostbolt spell using the same Shadow Strike as the basic template. But when I give both of the new spells to the same hero, it doesn't work properly. It's almost like they cast together, even though they're totally different spells and have different hotkeys. I'm confused. :-/

And as a side note, does anyone know how to write italics in tooltip text? I know how to change the color of the text, but not make it bold or italicized.

Thanks in advance for any help!