I have installed PTA signup and purchased the group addon and both are working great for my site. (we are actually using it to sign up for committee events for my yacht club.) We have a diverse population in our organization and not every one is tech savey so I often get volunteer signing up though email. Is there away i can assign spots to this individuals as the admin.
Enable Sign-up form live search? — If you check this box, admin users can use the public side to sign-up other volunteers for tasks. Start typing in a first or last name on the sign-up form, and matching users/volunteers will show in a drop down list you can select to automatically fill the fields. When you submit the sign-up, that sign-up gets assigned to that user (if they have a user account on your site) instead of to your admin account.
Live Search Tables — Select which tables to search for the above live search field. You can select WordPress Users, or the Sign-Ups table, or both.