frm_validate_field_entry unexpected results

Hi all,

First let me state that I am not a PHP programmer (I haven't coded since the early 80's (IBM 360 Assembler!), so this may be a simple "one D ten T" error.

By looking at the documentation and examples in the documentation and on the forum I was able to grok approximately what I need to do.  I can get things to work individually, but when I activate all the options I get an wrong result and I do not know how to fix it,

The form is an event registration form.  There are three fields accessed in the code - an admission type radio button [101]; and admin-only paid/notpaid dropdown [100] and user-type fields [179] (user-type is picked up from another form - user-account).

Here's the code:

add_filter('frm_validate_field_entry', 'hawk_gamemaster', 10, 3);
function hawk_gamemaster($errors, $posted_field, $posted_value ){
if( $posted_field->id == 179){
if( $_POST['item_meta'][$posted_field->id] = "HAWK" ){
$_POST['item_meta'][101] = "$10 - Gamemaster*";
}
}
return $errors;
}

add_filter('frm_validate_field_entry', 'hawk_paid', 10, 3);
function hawk_paid($errors, $posted_field, $posted_value){
if( $posted_field->id == 179 ){
if( $_POST['item_meta'][$posted_field->id] = "HAWK" ){
$_POST['item_meta'][100] = "Paid";
}
}
return $errors;
}

add_filter('frm_validate_field_entry', 'vendor_gamemaster', 10, 3);
function vendor_gamemaster($errors, $posted_field, $posted_value){
if( $posted_field->id == 179 ){
if( $_POST['item_meta'][$posted_field->id] = "Vendor" ){
$_POST['item_meta'][101] = "$10 - Gamemaster*";
}
}
return $errors;
}

add_filter('frm_validate_field_entry', 'vendor_paid', 10, 3);
function vendor_paid($errors, $posted_field, $posted_value){
if( $posted_field->id == 179 ){
if( $_POST['item_meta'][$posted_field->id] = "Vendor" ){
$_POST['item_meta'][100] = "Paid";
}
}
return $errors;
}

add_filter('frm_validate_field_entry', 'child_paid', 10, 3);
function child_paid( $errors, $posted_field, $posted_value){
if( $posted_field->id == 101 ){
if( $_POST['item_meta'][$posted_field->id] = "$0 - Child (age12 and under)*" ){
$_POST['item_meta'][100] = "Paid";
}
}
return $errors;
}

If the value of the user-type field [179] is HAWK or Vendor, then field 100 should be set to Paid and 100 should be set to "$10 - Gamemaster*", so that HAWK and Vendor can access other functions in the system currently controlled by being Paid up as a "$10 - Gamemaster*".

If the value of the admission type [101] is "$0 - Child (age12 and under)*", then field 100 should be set to Paid.

If I only have HAWK, or Vendor, or Child logic active, the code seems to work OK.  With all the logic active, I get one result regardless of the radio selection or the user-type: [100] is set to Paid; [101] is set to "$10 - Gamemaster*"; and [179] is set to Vendor, even when the user account field it is originally populated from is blank or HAWK.

What am I doing wrong?

Thanks

John H.