What is the meaning of "Complete and Send Review" in Elsevier journal under History tab
From your expanded screenshot, I would guess that complete and send review is supposed to actually mean review completed and sent, i.e., one of the reviewers completed their review and submitted it to the editorial system. 

However, educated guessing is all I can do, and only asking Elsevier can provide clarification. It may be a more serious bug. Either way, there is something to improve here, so it cannot harm filing a bug report.