Similar situation. I called MSC and they said they would add it. They did but the e-tickets still didn’t have the middle name. I called back and they reissued them but it still didn’t have the middle name. I called back and they said it's not a problem if the middle name it's not on the e-ticket. I know it needs to match the passport. Did this happen to anyone else and you didn’t have any issues boarding? Or should I call for the 4 time? Thanks.