adaliabooks: No problem, I have accidentally sent many a message with it so I understand.
The irony is that now I've disabled it I keep forgetting and pressing enter to send and nothing happens XD
Last active should indeed be the last people you've spoken too in order, but I can see that there are some problems with it still.
Unfortunately as everything is done by passing events and messages back and forth if you do things too quickly it does have a tendency to fail sometimes... I'll look into it and see if there's anything more I can do to stop it.
adaliabooks: A quick play around isn't showing up any errors... what browser are you on Treasure?
How common are the errors? If it's just an odd occurrence it might be alright to leave it, but if it's every time it'll definitely need sorted.
To answer your questions:
I played around some more, and the "user Y still there after having clicked user X" bug appears about 2 out of 5 times -this time I clicked around all over the place, just to be certain, not that I actually sent any messages before (I was just playing around)... It might happen with a particular user once, but after a while it might not repeat but this bug occurs every time I click on the username on the top of the contact list when sorted by "Recently active". Case in point: My last session was with moonshineshadow ; the first time I click it just doesn't show anything on top, nor username nor join date and not a pic, and after clicking some other usernames and returning to clikc again the 1st one, the other username remains on top and that one's shown instead of the one just clicked. I attached pics in case that helps (I can't really show the fact I had just clicked moon's entry though...) Tl;dr: I clikc the 1st time, see nothing -later clikc after clicking on another user user, and see the other user instead
As for my browser, I'm using Chrome, and have Adalia Fundamentals installed via Tampermonkey, in case that helps.