The merge message on Cutliff-8 says the merge was proposed by you, Karen, 14 March 2018.
I think that what has happened here is that on April 24 somebody has tried to complete the merge, which would have default approval by then- not sure how the defaulting works works when one of the profiles is green locked. Anyway, because of the green lock it couldn't be completed.
The date of merge proposal resets when somebody starts to complete/try completing the merge - there were discussions about this over a year ago, haven't seen any recently.
All in all, there are a bit too many ifs and buts in the process.