I beleive the issue is because in editproduct.php the price is not even in the query to update it
$query = "UPDATE {$Globals['pp_db_prefix']}products SET {$extraq}title='$title',keywords='$keywords',description='$desc',
price='$price',rating='$rating',
extra1='$extra1',extra2='$extra2',extra3='$extra3',extra4='$extra4',extra5='$extra5',extra6='$extra6',zipcode='$myzipcode',adoptions=$adoptions WHERE id=$phoedit";
$resulta = ppmysql_query($query,$link);