mysql_multi_query inside a foreach loop - php

Question

I try to parse a xml file and store each node to a mysql db. The problem is that it store the data in the first loop and returns error in the second time. If I refresh the page it stores the rest data as well.
I try to understand why does it behave in a such way
<?php
try{
$records = simplexml_load_file("file.xml");
} catch (Exception $e){
echo "xml problem";
}
#replace loclhost,user, pass, dbname
$db = mysqli_connect("localhost", "root", "", "project") or die("could not connect:" . mysqli_connect_error());
foreach($records->record as $rec){
$species_location_x = $rec->species_lang;
$species_location_y = $rec->species_long;
$species_abundance = (string)$rec->abundance;
$species_text = (string)$rec->text;
$species_scene_photo = (string)$rec->space_photo;
$species_photo_loc = (string)$rec->specimen_photo;
$site_name = (string)$rec->site->sitename;
$site_location = (string)$rec->site->sitelocation;
$site_description = (string)$rec->site->sitedescription;
$user_name = (string)$rec->user->lastname;
$user_phone = (string)$rec->user->namephone;
$user_email = (string)$rec->user->useremail;
$species_name = (string)$rec->species->species_name;
#print_r($species_location_x." ".$species_location_y." ".$species_abundance." ".$species_text." ".$species_scene_photo." ".$species_photo_loc);
#print_r($site_name." ".$site_location." ".$site_description);
#print_r($user_name." ".$user_phone." ".$user_email);
#print_r($species_name);
$multiq = "INSERT INTO users (user_name, user_phone, user_email)
VALUES ('$user_name', '$user_phone', '$user_email');" ;
$multiq .= "INSERT INTO records (user_name, record_location, record_abundance, record_text, record_scene_photo_location, record_specimen_photo_location )
VALUES ( '$user_name',
GeomFromText('point($species_location_x $species_location_y)'),
'$species_abundance',
'$species_text',
'$species_scene_photo',
'$species_photo_loc');" ;
$multiq .= "INSERT INTO species (species_name, records_id )
VALUES ( '$species_name', (select record_id from records where user_name = '$user_name' and record_abundance = '$species_abundance' and record_text = '$species_text'));" ;
$multiq .= "INSERT INTO sites (site_name, site_location, site_description, species_id)
VALUES ('$site_name', '$site_location', '$site_description', (select species_id from species where species_name='$species_name'));";
if(mysqli_multi_query($db, $multiq)){
echo "records added successfully\n";
}
else{
echo "problem";
}
}
mysqli_close($db);