G'day mazdajai,

Welcome to the Monastery.

In the context of this question, I'll assume "rows" refers to 'tr' elements. Your output only shows one 'tr' element: no duplicates there.

The single 'tr' element contains a number of 'td' elements. All of these are unique except this, which appears twice:

<td align="left" class="AltWarning" height="17"></td>
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Accordingly, this 'td' element appears twice in the output.

Due to a lack of expected output, I can't tell what you want to keep and what you want to discard. See How do I post a question effectively? for details on what to provide to get a better answer from us. Here's a couple of guesses.

• To get only the 'tr' or 'td' elements, use "_tag => 'wanted_element'" in the look_down() method.
• To exclude duplicate 'td' elements, use grep. The standard idiom looks like this:

  my %seen;
  @warnings = grep { ! $seen{$_}++ } @warnings;
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