html - Counter-increment with wrapping divs

Question

I want to use a counter-increment on ordered lists. I want each ol to continue on the previous count.

It works when I don't have separate wrapping divs around the ols. Note that it works for the second ol which is within the same wrapping div, but it stops working for the next two ols which has a separate wrapping div:

http://jsfiddle.net/graphic_dev/Lsn49t16/1/

HTML

<div class="wrapper">
    <ol class="split start">
      <li>Lorem</li>
      <li>Ipsum</li>
      <li>Dolor</li>
    </ol>

    <ol class="split">
      <li>Sit</li>
      <li>Amet</li>
    </ol>
</div>

<div class="wrapper">
    <!-- It stops working here -->
    <ol class="split">
      <li>Consectetur</li>
      <li>Adipiscing </li>
    </ol>

    <ol class="split">
      <li>Elit</li>
      <li>Sed</li>
    </ol>
</div>

CSS

.start {
    counter-reset: mycounter;
}

.split {
    list-style-type: none;
}

.split li:before {
    counter-increment: mycounter;
    content: counter(mycounter, upper-alpha);
}

How do I get it continuing the count for each ol? I need the wrapping divs