I was hoping to sample the next stop announcements on my X21/21 back from Sunderland this evening but I got lumbered with 4811 which despite the fact the 21/X21 has a PVR of 4 they've only fitted the announcements to 4812/13/14 and 4811 is on the 21/X21 most days! Not heard the announcements on those routes yet but I understand what you mean about the screens and announcements popping up at the wrong points, it's the same with the recently reprogrammed announcements for the X26/X27 and X66/X67 although half the time I've been on the X66 since they were reprogrammed it's found it's self jammed on one stop, had 4657 last night and it said Great Burdon for the whole of my journey between Stockton and Harrowgate Hill Roundabout. It's quite poor really, it actually infuriates me!
Now to start typing up my review!