thank you so much for pointing the bug out to us! we're also working on making the history tab more user-friendly and will amend these issues in our next instalment!
as for Vivian and Nico's achievements, the pages are currently just placeholders aside from the "meeting them for the first time" achievements, which are part of the common route. sorry if that wasn't clear in our previous message! the "???"s you see are normal!
once again, thank you so much for your help! we really appreciate it!