The creation time in seconds was compared with the offset in
milliseconds, which made any saved offset win. That is the behaviour to
keep: remote.unmount recreates the directory and then saves the offset,
usually in the same second, so a seconds comparison would start at the
creation second and replay the purge. The comparison now states it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>