I know. No I haven't, but the device is brand new so I didn't think there'd be any software cruft. I will try it and report back, thanks for your help.

Edit: I uninstalled and reinstalled it, unfortunately the exact same tweet strangeness. "Load More" takes a bit too long to work, and then only works a couple of times before stalling for what seems like forever. I have that problem where the tweets stop going down chronologically from most recent, and half way through it goes to an earlier timed tweet.