Sometimes I type in less than full times into the start time and end time entry fields, sometimes it is by accident, sometimes I know that tmetric will auto-complete `3:0a` to `3:00 am`. There's an annoying behavior with the end time field though:
Let's say start time is set to "4:30 pm", and then I type in "5:00" into the end time field, the system assumes I mean five AM and resets the start time to 4:30 am. It should not do that. My explicit PM in the first field should override the unspecified suffix in the end time field. Only when I manually type "AM" should the end time cause the start time to change.