Code review comment for ubuntu-archive-tools:optimize-phased-updater

I was testing this today and ran it locally and then waited for the server to finish running its version of the report. Strangely, the one I ran locally show gce-compute-image-packages as being phased to 40% while the report on ubuntu-archive-team showed it as being phased to 30%. Additionally, checking in Launchpad right now show both binary packages as being phased at 30%. So I'm a bit concerned something is awry with this change and think it bears further investigation.