I viewed the source of your double spoiler tags and this is what I found:
Code
<span style="color: #008080">All it says about them is this <!-- begin:parser_nonessential -->
<div class="container containerPadding spoilerBox">
<header class="jsOnly">
<a class="button jsSpoilerToggle">Show Spoiler</a>
</header>
<div style="display: none">
</div>
</div>
<!-- end:parser_nonessential --></span><!-- begin:parser_nonessential -->
<div class="container containerPadding spoilerBox">
<header class="jsOnly">
<a class="button jsSpoilerToggle">Show Spoiler</a>
</header>
<div style="display: none">
The egg hatched into a... chick? It's hard to see under all that fluff!<span style="color: #008080"></span> </div>
</div>
<!-- end:parser_nonessential --><span style="color: #008080"></span> </div>
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As you can see, there are two "container containerPadding spoilerBox" when there ought to only be one. It won't look so complicated if you view it in your post under the Source tag.
Who knows?)