Weird one - spouse and I (GS/Plat) flying together on separate PNRs but both in J on transcon 787-10 in seats 3D and 3F. We both get emails yesterday saying that an equipment swap required a seat change. I'm moved to 7D. Weirdly, his email says the new seat was 3F - the same seat! When I went online, my original 3D was still open, so I just moved back to it. So weird and fairly obnoxious. IT needs to get that together. If I was a novice traveler, I'd be livid if I showed up and our seats were mysteriously separated.