php in_array - unexpected behavior

Not sure why this is happening, but my script doesn't seem to be able to return true for in_array more than once...

I'm posting the code below:

$saved = '15,22';    
$set = explode(",",$saved); //results in Array ( [0] => 15 [1] => 22 ) 

//Then, I query the database:

$result = pg_query("SELECT did,vid,iid,value FROM demographicValues");
if(pg_num_rows($result) > 0) {
  while($r = pg_fetch_array($result)) {
     $demo[$r['did']][$r['vid']]['value'] = $r['value'];
     if(in_array($r['vid'], $set)) {
       $demo[$r['did']][$r['vid']]['status'] = 1;
     }
  }
} else...

/*
If I print_r $demo, you can see that the vid 22 is in there, so, I'm not understanding why the status isn't being set accordingly?
*/
    Array
    (
        [Mant] => Array
            (
                [15] => Array
                    (
                        [value] => Proper
                        [checked] => 1
                    )

                [16] => Array
                    (
                        [value] => Parish
                    )
        [Comp] => Array
            (
                [22] => Array
                    (
                        [value] => 65 - 70
                    )

                [23] => Array
                    (
                        [value] => 35 - 50
                    )
        )

)

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