It appears that you are not extracting your $atts correctly or at all for that matter.
Use the correct procedure to get access to the passed attributes allong with setting up defaults as a fallback:
extract( shortcode_atts( array(
'shortcode' => 'default_value',
'title' => 'Default Title',
), $atts ) );
There is infact an extensive guideline on shortcode attributes in the Codex, http://codex.wordpress.org/Shortcode_API#Attributes
When in doubt just copy the WP examples and take if from there.
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