Help with list field array filing to custom field

Since it appears you cannot change the name value on an input field, I decided to take a try at using the gform_after_submission hook and see if I could file the form fields to the custom field in Wordpress. Surprisingly I'm almost there! Just need help with the array.

Instructions is a 1 column list field and it's number 10. I'm trying to file this to a custom field called instruction.

I'm using the following:

function set_post_content($entry, $form) {
 $post = get_post($entry["post_id"]);
 $instructions = $entry[10];
 $post->post_content = $instructions;
 update_post_meta($entry["post_id"],'instruction',$post);
}
add_action("gform_after_submission_1", "set_post_content", 10, 2);

After submitting the following:

Step 1 instruction
Step 2 instruction

I'm seeing the following appear in the back end when it's filed to my custom post type:

3
1
2
0
a
T
...

I think it's pieces of the array. What am I missing to allow it file the data correctly? Thank you!