I actually have different origin / destination shown, for the outbound my iPhone app shows:
UA2888
Hartford, CT (ZTF) to New York/Newark, NJ (EWR)
And United.com Reservations shows
UA2888
Depart:
12:58
Stamford, CT, US (ZTF - Rail Station)
Arrive:
14:27
New York/Newark, NJ, US (EWR - Liberty)
Same times, return has the same issue.