Problem with Caching Queries

[eluser]Unknown[/eluser]
I keep getting an "A Database Error Occurred Error Number: 1052," but the database query that it says its running is no where in my code. It's almost as if it's caching parameters from previous queries on the page and adding to.

For example, here's my model:

Code:

function get_my_total_task_count() {
    $this->db->where('status_id <', '1');
    $this->db->where('person_id', $this->session->userdata('user_id'));
    $this->db->join('exp_taskassignments', 'task_id = exp_tasks.id');
    $query = $this->db->count_all('exp_tasks');
    return $query;
}

The complete error message says:

A Database Error Occurred
Error Number: 1052
Column 'id' in field list is ambiguous
SELECT `id`, `title` FROM (`exp_teams`) JOIN `exp_taskassignments` ON `task_id` = `exp_tasks`.`id` WHERE `status_id` < '1' AND `person_id` = '1' ORDER BY `title` asc

When I comment out the function listed above, the error goes away.

I've tried

Code:

$this->db->flush_cache();

but that's not helping either.

Thanks in advance.