multiple taxonomy fields using a single taxonomy on the same page bug!

Hi,

I have two taxonomy fields, both using the same taxonomy.
When i save the post/page the lowest field updates the previous fields?

They have unique ID's.
Even when placed inside different metaboxes the one updates the other.

array(
    'name'       => 'Area Left',
    'id'         => "{$prefix}venue_left",
    'type'       => 'taxonomy',
    // Taxonomy slug.
    'taxonomy'   => 'venue',
    'field_type' => 'select_advanced',
),
array(
    'name'       => 'Area Right',
    'id'         => "{$prefix}venue_right",
    'type'       => 'taxonomy',
    // Taxonomy slug.
    'taxonomy'   => 'venue',
    'field_type' => 'select_advanced',
),