origin time wrong in summary quakeml

When pre 1970 hypocenter data is pulled using the FDSN services the origin time is different than in the submitted quakeML for the event. Any ideas?

wget -O odd.qml "https://earthquake.usgs.gov/fdsnws/event/1/query.quakeml?starttime=1969-04-28%2023:00:00&endtime=1969-04-29%2000:00:00&includeallorigins=true&includeallmagnitudes=true&orderby=time-asc"

/cc @pearle