My wife and I have the same last name and first initial. We always encountered error messages checking in online together about a year ago, and it looks like this problem might be cropping up again. I was able to check her in, but then when I went to check myself in, OLCI told me that I was already checked in!

Looks like the system has never been able to check-in more than one person per booking reference with the same last name and first initial.

What is worse is that I changed her seat on check-in, and now I can't change mine and we are sitting far apart from each other!