Field Merge Tags

Hey All.
Was hoping to get a little help using field merge tags.
I am trying to pull in an email field from the form as im using gravity flow as well as the plugin for hiding fields in the all_field section when sending the form to people.

Basically once an approval has been made by the manager i am trying to send the form to someone else with a single line added in sating the managers email has approved.

I was using the advanced tab in the single line field and had the default value of {Email:6} Has approved this request.

However once the manager approves the request and it is sent so someone else the form they get simply states {Email:6} Has approved this request.

Email:6 refers to the field where the user entered their managers email address.

Am i using the correct merge tag?