Turns out when you use training with the same option twice or more in a row, you gain extra stats for it.
Or maybe just same stat? I only bother doing the 55 point one.
Edit: Or there was some other trigger entirely? Didn't happen this time.
Edit the second: Looks like Elsie has a special convo around level 4 and 28%ish with the Training keyword that wasn't on the spreadsheet.