Quote Originally Posted by Silverquick View Post
You cast Jolt, and hit it right as the casting time is near the end and it dual casts the next spell. No actual CD... it just goes off instantly.

There's no second CD or rather it completely ignores it. So even though it should have been a 2.36 CD.... it's only 1.8 casting time and the Dual Casted spell goes off.

And I can do it multiple times with the same result. So it isn't some kind of wild guessing.
I'm not saying it's wild guessing, I'm saying you may be misinterpreting how the GCD works. You can't do a move on the GCD while the GCD is resetting. RDM is not an exception to this rule. It's just how the game's designed. Maybe a time-table will help explain.

0: Jolt GCD starting
0 - 1.8: Jolt casting
1.8: Jolt cast, Dual Cast proc
1.8 - 2.36: GCD for jolt finishing
2.36: Jolt CD complete, GCD reset, Verthunder cast, GCD starting (thanks to ability queue, this all happens simultaneously)
2.36 - 4.72: GCD resetting (you can't do a GCD move here just like you can't during 1.8 - 2.36, however you can queue it by mashing)
4.72: Repeat from 0

Regardless of what you're testing or what you see, this is what is happening. No CDs are being ignored. Verthunder can't be cast until the GCD for Jolt is completed. The easiest way to tell is by looking at the hotbar actions. Once Jolt is cast, you can still see a little bit of Verthunder's action icon darkened out. You can't cast while that sliver is there. I can see how you may think it's instant cause you're focusing on the battle and it's less than half a second, but the move is only insta-cast once the GCD is reset. Again, the only thing omitted from normal is the cast time of your second skill.