Shadow, I agree with you that double upgrading should be allowed (at least on a Standby basis). But I don't see anything in AuH2o's post that he was indicating any violation of policy on United's part that would warrant an audit of the manifest. Actually to me it reads like he was quite happy that they did in fact allow him to double upgrade.

Curious if any of the other majors allow double upgrading? I'll post the question.