Fix Conpherence transaction ordering

Summary: Ref T7815. Pretty sure this is right? Seems OK locally. Also: simpler!

Test Plan:

• Conpherence is right-side-up.
• Transactions on other objects are also still right-side-up.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T7815

Differential Revision: https://secure.phabricator.com/D12398