Change the color to white and make sure to press return/enter at the end of the first closing bracket, and at the first opening bracket on the last spoiler... this must sound confusing, but I don't have any other way of explaining it.
It looks like you changed one of them to white. Try the other, and make sure to put them both on individual lines.
Okay... you know how you have the green smiley-face at the end? Click to the right of that, press return. CAPITALIZE the spoilers. Now click to the left of the right bracket on the first spoiler, and CAPITALIZE that too. Then change them both to white. DONT SAVE UNTIL YOU DO ALL OF THIS.
I think people should do this more often. It slightly annoys me when people have long signatures because it means I have to scroll a lot more. I've even seen someone with a really long signature post several times because they don't know how to edit posts, and I'm sure you know how that feels scrolling through the same thing repeatedly.