RetailOps 2.5.7 is available now, which contains the following fixes:
Fixed - When upgrading versions, some POs with "Allow Inflight" checked would uncheck this option when viewed in 2.5.6. This has been corrected, and the "Allow Inflight" checkbox is preserved across versions.
To upgrade your account to 2.5.7, navigate to Administration > System Config > Application Version. Select [Test Version] to preview this version in your browser only, and [Upgrade Account]to upgrade your account for all users.