You describe triggering from a sequencer. Will you please describe the physical configuration, e.g. what is the sequencer? How is it connected to each device? How are the audio from each device connected to your recorder? How is that audio routed to the recorder? It is difficult to see the difference in timing in your picture. A more zoomed view with timing info and a vertical marker at start of sound may help.
Understanding your test environment may give clues to where the issue is.