Fix Ponder Exception, spacing

Summary: Evidently I only tested adding a question, not an answer. Properly set the getter. Also, fixed some header spacing.

Test Plan: Add a question, add an answer. See everything work, proper spacing.

Reviewers: epriestley, avivey

Reviewed By: avivey

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D15341